Apparatus for producing a packing

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Patent issued

01/12/1993

Inventor(s):	Schmetzer, Helmut
Assignee	Schwede; Roland (all of) Schwede; Horst (all of) Schmetzer; Helmut (all of)
Application	No. 07/749,536 filed on 08/23/1991
Current US Class	53/228, 53/550, 53/552, 29/521, 493/350, 493/390
Field of search	53/228, 53/229, 53/427, 53/412, 53/374.8, 53/373.2, 53/486, 53/487, 53/374.2, 53/466, 53/138.1, 53/550, 53/552, 29/432.2, 29/521, 493/350, 493/390, 493/391, 493/392
International Classes:	B65B 1110, B65B 5100, B65B 6106
Examiners
Primary	Culver Horace M.
Attorney, agent or firm:	Laff, Whitesel, Conte & Saret
US patent references	2188222, 2272473, 2372406, 3106139, 3158973, 3323983, 3589100, 3728779, 3874976, 3890761, 3981064, 4499706, 4509314, 4534092, 4835850, 5010714
Foreign patents	1452627 (09/30/1969, DE), 1965648 (08/31/1970, DE), 2156134 (04/30/1972, DE), 3515643 (09/30/1986, DE), 508906 (06/30/1939, GB), 8806016 (06/30/1988, WO)

In order to connect at least two layers of paper or the like, the layersare cut into strips in the connection area and forced out of the plane ofthe layers alternately and in pairs. To this effect punching and pressingtools with punching teeth may be provided.
N
This is continuation-in-part of our application No. 07/557,712 filed Jul.25, 1990 and now abandoned.
FIELD OF THE INVENTION
The invention relates to an apparatus for producing a packing by connectingat least two layers of paper, thin board, in particular craft paper andrecycling paper, in an adhesive-free manner, the layers being put togetheralong a connection seam and being connected with each other by a punchingand pressing action by alternating deformation approximately across theplane of the layers.
BACKGROUND OF THE INVENTION
It is known to connect paper, thin board or the like in an adhesive-freemanner in such a way that two layers of paper or the like arranged on topof each other are deformed by means of a knurling roller out of the mainplane of the layers. Thus, a certain denticulation of the two layersconsisting of web sections or sheets is achieved. This kind of connectionis not particularly firm. For this reason an adhesive is very often usedin this context.
Lots of things are wrapped up in plastic sheets, which are glued or weldedto one another or which are shrunk on. The use of plastic sheets is notdesirable. Moreover, vapours result during the shrinking of sheets, whichare not desirable, either. The wrapping up with paper necessitates the useof an adhesive, which on the one hand is not desirable for reasons ofpollution control. Moreover, it takes a considerable time as a rule forthe adhesive to cure or dry to such extent that the connecting seam issufficiently firm. On the other hand, there are many fields of applicationwhere the demands on a firm packing or wrapping or the demands on a firmconnection are not very high, since the packing or wrapping is providedfor a short period of time as a rule for transport only.
SUMMARY OF THE INVENTION
It is accordingly the object of the invention to embody an apparatus forthe production of a packing, by means of which a particularlynon-polluting packing can be realized in simple manner.
This object is attained in accordance with an apparatus of the above typecomprising at least a pair of a first and a second punching and pressingtool, which first and second punching and pressing tools arecomplementarily associated with each other and are alternately providedwith punching teeth, with in each case one punching tooth of the firstpunching and pressing tool being provided to engage with an interspacebetween two neighbouring punching teeth of the second punching andpressing tool, with a width of each interspace essentially correspondingto a width of a corresponding punching tooth and with an edge limitingeach punching tooth towards a neighbouring interspace being provided as acutting edge, wherein the punching teeth of each first and second punchingand pressing tool are lined up in a common tool plane, and a pair of afirst and a second tool carrier, wherein the first punching and pressingtool is arranged on the first tool carrier and wherein the second punchingand pressing tool is arranged on the second tool carrier, and wherein atleast one of the tool carriers is movable in a direction perpendicular tosaid tool plane. By means of the punching and pressing tools the layersare put together in a connection area and are connected with each otheracross a main plane of the layers, wherein said layers are cut in stripsonly in the connection area, which strips each have two ends, both endsremaining uncut and connected to one of said layers and cut edges betweensaid ends, and which strips are forced out of said main plane of thelayers alternately in pairs and which cut edges are distorted in anarch-like manner. As a result of the measures according to the inventionit is achieved that the strips, which remain of course connected withtheir ends to the corresponding layer of paper or the like, are forced outof the layers alternately and oppositely in pairs, thus hooking the twolayers in an extraordinarily intensive manner. The less smooth, i.e. thesimpler, the paper, the thin board or the like are, the firmer is theconnection. Thus, craft paper and recycling paper are particularly apt.The packing or wrapping may for example serve to wrap up stacks ofnewspapers or journals for shipment, with only four sides being wrappedup, whilst two opposite sides remain uncovered. For the purpose of safetransporting of these packages they may in addition be surrounded by onehoop or several hoops. Furthermore, other things, such as clothes orsingle or several journals may be wrapped up in a bag-like packing closedon some sides with an apparatus according to the invention.
Further advantages, features and details of the invention will becomeapparent from the ensuing description of two exemplary embodiments, takenin conjunction with the drawings.

What is claimed is:
1. In an apparatus for producing a packing made of at least two layers ofpacking paper, in particular craft paper, recycling paper and thin board,which layers cover an object to be packed and are put together along aconnecting seam (26) in an adhesive-free manner by a punching and pressingaction, the improvement comprising:
at least a pair of a first and a second punching and pressing tool (19, 20;19', 20'; 56, 57), which first and second punching and pressing tools (19,19', 20, 20', 56, 57) are complementary associated with each other;
punching teeth (21) alternately provided at said first and second punchingand pressing tools (19, 20; 19', 20'; 56, 57), which punching teeth (21)of each first and second punching and pressing tool (19, 19', 20, 20', 56,57) are lined up in a common tool plane (W);
an interspace (22) between each of said punching teeth (21) with in eachcase one punching tooth (21) of the first punching and pressing tool (19and 20, 19' and 20', 56 and 57), being provided to engage with aninterspace (22) between two neighbouring punching teeth (21, 38) of thesecond punching and pressing tool (20 and 19, 20' and 19', 57 and 56),with a width (a) of each interspace (22) essentially corresponding to awidth (b) of a corresponding punching tooth (21);
an edge limiting each punching tooth (21; 38) towards a neighbouringinterspace (22) being provided as a cutting edge (23);
a first and a second tool carrier (14, 15; 54, 55), wherein the firstpunching and pressing tool (19, 19', 56) is arranged on the first toolcarrier (15, 55) and wherein the second punching and pressing tool (20,20', 57) is arranged on the second tool carrier (14, 54), and wherein atleast one of the tool carriers (14, 15, 54, 55) is movable in a directionperpendicular to said tool plane (W).
2. An apparatus according to claim 1, wherein the first and the secondpunching and pressing tool (19, 19', 20, 20') each has punching teeth (21)lined up in a straight line and is in the form of a beam.
3. An apparatus according to claim 2, wherein the first and second punchingand pressing tools (19, 19' and 20, 20'), are arranged on each first andsecond tool carrier (14 and 15).
4. An apparatus according to claim 3, wherein a cutting knife (17) isarranged on at least one of said each first and second tool carriers (14)between said two punching and pressing tools (19) arranged on one of saideach tool carriers (14).
5. An apparatus according to claim 1, wherein the punching teeth (21) ofeach of said first and second punching and pressing tools (56, 57) arelined up in a circumferential, closed line.
6. An apparatus according to claim 5, wherein said punching teeth (21) arelined up in a circle.
7. An apparatus according to claim 5, wherein, outside said first andsecond punching and pressing tools (56, 57) provided with punching teeth(21) lined up on a circumferential closed line, a perforating knife (66,67) is provided on the first and second tool carrier (54, 55).
8. In an apparatus for producing a packing made of at least two layers ofpacking paper, in particular craft paper, recycling paper and thin board,which layers cover an object to be packed and are put together along aconnecting seam (26) in an adhesive-free manner by a punching and pressingaction, the improvement comprising
at least a pair of a first and a second punching and pressing tool (19, 20;19', 20'; 56, 57), which first and second punching and pressing tools (19,19', 20, 20', 56, 57) are complementarily associated with each other;
punching teeth (21) alternately provided at said first and second punchingand pressing tools (19, 20; 19', 20'; 56, 57), which punching teeth (21)of each first and second punching and pressing tool (19, 19', 20, 20', 56,57) are lined up in a common tool plane (W);
an interspace (22) between each of said punching teeth (21) with in eachcase one punching tooth (21) of the first punching and pressing tool (19and 20, 19' and 20', 56 and 57, ) being provided to engage with aninterspace (22) between two neighbouring punching teeth (21, 38) of thesecond punching and pressing tool (20 and 19, 20' and 19', 57 and 56, ),with a width (a) of each interspace (22) essentially corresponding to awidth (b) of a corresponding punching tooth (21);
an edge limiting each punching tooth (21; 38) towards a neighbouringinterspace (22) being provided as a cutting edge (23);
a first and a second tool carrier (14, 15; 54, 55), wherein the firstpunching and pressing tool (19, 19', 56) is arranged on the first toolcarrier (15, 55) and wherein the second punching and pressing tool (20,20', 57) is arranged on the second tool carrier (14, 54), and wherein atleast one of the tool carriers (14, 15, 54, 55) is movable in a directionperpendicular to said tool plane (W);
deflectors (40) for each of said first and second punching and pressingtools (19, 20; 19', 20'; 56, 57), each of which is supported to bedisplaceable against a force of a compression spring (47), which isdirected against the direction of engagement (E) of the punching tooth(21) of the first punching and pressing tool (19, 19', 56) with theinterspace (22) of the second punching and pressing tool (20, 20', 57) andvice versa; and
deflection webs (44) provided at each of said deflectors (40), each of saidwebs (44) engaging with the interspace (22) between two adjacent punchingteeth (21).
9. An apparatus according to claim 8, wherein each of the deflectors (40)is attached to each of said first and second tool carriers (14, 15).
10. An apparatus according to claim 8, wherein each deflector (40) issubstantially U-shaped in cross-section, U-legs (41, 42) of said deflector(40) flanking longitudinal sides (48) of the tool carrier (14, 15)extending in parallel to the direction of engagement (E), and a U-base(43) of said deflector (40) extending in the vicinity of the punchingteeth (21), the deflection webs (44) being formed between recesses (45) inthe U-base (43), through which the punching teeth (21) pass.
11. An apparatus according to claim 8, wherein each deflector (40) issubstantially U-shaped in cross-section, U-legs (41, 42) of said deflector(40) flanking longitudinal sides (48) of the tool (56, 57) extending inparallel to the direction of engagement (E), and a U-base (43) of saiddeflector (40) extending in the vicinity of the punching teeth (21), thedeflection webs (44) being formed between recesses (45) in the U-base(43), through which the punching teeth (21) pass.
12. An apparatus according to claim 8, wherein the deflector (40) isslidably supported between an extracted and a retracted stop positionwhile being arranged in the extracted stop position when said first andsecond punching and pressing tools (19, 20 and 19', 20', and 56, 57, areapart and in the retracted stop position when said first and secondpunching and pressing tools (19, 20 and 19', 20', and 56, 57, ) are inengagement.
13. An apparatus according to claim 12, wherein, in the extracted stopposition, the U-base (43) of each deflector (40) is arranged ahead of thepunching teeth (21) of the associated first and second punching andpressing tool (19, 19', 20, 20', 56, 57) in the direction of engagement(E).
14. An apparatus according to claim 8, wherein the depth of engagement (T)of each punching tooth (21) of said first punching and pressing tool (19,19', 20, 20', 56, 57) with the corresponding interspace (22) of saidsecond punching and pressing tool (20, 20', 19, 19', 57, 56) correspondsto the depth (t) of the interspace (22) less the thickness (D) of thedeflection webs (44).
15. An apparatus according to claim 12, wherein, in the extracted stopposition, said U-base (43) of each deflector (40) is arranged ahead of thecutting knife (17) in the direction of engagement (E).
16. An apparatus according to claim 8, wherein the first and the secondpunching and pressing tool (19, 19', 20, 20') each has punching teeth (21)lined up in a straight line and is in the form of a beam.
17. An apparatus according to claim 16, wherein two first and secondpunching and pressing tools (19, 19' and 20, 20', ) are arranged on eachfirst and second tool carrier (14 and 15, ).
18. An apparatus according to claim 17, wherein a cutting knife (17) isarranged on at least one of said each first and second tool carriers (14)between said two punching and pressing tools (19) arranged on one of saideach tool carriers (14).
19. An apparatus according to claim 18, wherein the punching teeth (21) ofeach of said first and second punching and pressing tools (56, 57) arelined up in a circumferential, closed line.
20. An apparatus according to claim 19, wherein said punching teeth (21)are lined up in a circle.
21. An apparatus according to claim 19, wherein, outside said first andsecond punching and pressing tools (56, 57) provided with punching teeth(21) lined up on a circumferential closed line, a perforating knife (66,67) is provided on the first and second tool carrier (54, 55).

BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows an apparatus for the wrapping up of things in a diagrammaticrepresentation, with an object entering,
FIG. 2 shows an apparatus according to FIG. 1, with the object arriving ata working station,
FIG. 3 shows the apparatus according to FIGS. 1 and 2, with a connectingseam being produced,
FIG. 4 shows the apparatus according to FIGS. 1 to 3 in a perspective view,
FIG. 5 shows two layers of paper with two punching and pressing tools aftera connecting seam has been produced,
FIG. 6 is a lateral view of two complementary punching and pressing toolseach provided with deflectors,
FIG. 7 shows partial cross-sections of complementary punching and pressingtools along the section line VII--VII according to FIG. 6 with differentdeflector positions,
FIG. 8 is a perspective representation of a working station of a packingapparatus with in each case associated punching and pressing toolsmutually complementary for the production of a closed connecting seam,
FIGS. 9 and 10 are sections through the punching and pressing tool alongthe section plane IX--IX according to FIG. 8 in different deflectorpositions,
FIG. 11 is a diagrammatic representation of a second embodiment of anapparatus for the packing of objects with a working station according toFIG. 8, and
FIG. 12 is a plan view of a deflector according to FIGS. 6 and 7.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to the embodiment according to FIGS. 1 to 5, a feeding conveyingbelt 1 is located about in the center of a machine frame A and comprisesan endless belt 2, a deflection pulley 3 and a driven transport pulley 4,via which it is guided. The drive is generated by an electric motor 4a.The top run 5 of the belt 2 is drivable in transport direction 6, i.e.from the right to the left in the drawing. A working station 7 to bedescribed below is provided to follow in transport direction, which isfollowed by a discharge conveying belt 8 designed in the same way as theconveying belt 1. Its components therefore have the same referencenumerals with a prime. The top run 5 and the top run 5' are in alignment.A roll 10 of web-shaped packing or wrapping material, such as paper, craftpaper, recycling paper or the like, is arranged below the feedingconveying belt 1 on idler pulleys 9, one of which is drivable by means ofan electric motor 9a. A web 11 is drawn off the roll 10 by means of a pairof drawing-off pulleys 12 and fed to the working station 7. The pair ofdrawing-off pulleys 12 is equally drivable by a motor which is however notshown. A further roll 10' of the same packing or wrapping material as thatof the roll 10 is supported on idler pulleys 9' above the feedingconveying belt 1. A web 11' is drawn off this roll 10' via a pair ofdrawing-off pulleys 12' and fed to the working station 7.
A connecting device 13 is provided in the working station 7, by means ofwhich the two webs 11 and 11' are connected with each other in anadhesive-free manner. This connecting device 13 has a lower beam 14 and anupper beam 15 serving as a tool carrier. In the embodiment shown the lowerbeam 14 is stationary; it may, however, also be drivable vertically bymeans of one or several linear drives, for example piston-cylinder drives.The upper beam 15 is vertically slidable by means of at least one lineardrive 16 in the form of a hydraulically or pneumatically actuatablepiston-cylinder drive. It is in its upper rest position in FIGS. 1 and 2.
The lower beam 14 has a cutting knife 17 arranged centrally and extendingat least over the width of the webs 11, 11' which cutting knife 17immerges into an opposite slot 18 in the upper beam 15 when the beams 14,15 are joined.
A pair of punching and pressing tools 19, 19' and 20, 20', respectively, isarranged on each side of the cutting knife 17 and the opposite slot 18,respectively, which punching and pressing tools 19, 20 are associated inpairs and shown in greater detail in FIG. 5. Each tool 19, 20 hasidentical punching teeth 21, the distance a between them being larger thantheir width b only by some hundredths of a millimeter, so that the tools19, 19', 20, 20' offset may engage with one another, whereby the punchingteeth 21 of one tool 19 immerge in between the neighbouring punching teeth21 and vice versa. The edges limiting the punching teeth 21 towards eachinterspace 22 form cutting edges 23. The punching teeth 21 of eachpunching and pressing tool 19, 19', 20, 20' are in each case lined up in acommon tool plane W. The tool planes W of the tools 19, 19', 20, 20' arehorizontal, the beams 14, 15 thus being drivable towards each another andaway from each other perpendicularly to the tool planes W by means of thelinear drive.
When-as can in particular be seen from FIG. 5-two webs 11, 11' lying flatone upon the other in this area are guided between two tools 19, 20, thenboth webs are punched at the cutting edges 23 associated in pairs of thepunching teeth 21 of both tools, whereby both webs 11, 11' are cut intostrips 24, 24' extending in transport direction 6 and transverse to theseam direction N in this area and corresponding in their width e to thewidth b of the punching teeth 21. These strips 24, 24' are bent out of thecommon plane of the webs 11, 11' in each case in pairs and alternatelycorresponding to the extension of the surface 25 of the punching teeth 21limited by the cutting edges 23. An extraordinarily firm connecting seam26 is thus achieved. Regarding the length d of the strips 24, 24' inrelation to their width e 7e.gtoreq.d.gtoreq.2e applies.
As mentioned, a pair of such punching and pressing tools 19, 19', 20, 20'is provided on each of the beams 14, 15 on both sides of the cutting knifeand the opposite slot 18, respectively, so that upon closing of theconnecting device 13 by joining the beams 14, 15, the two webs 11, 11' areconnected with each other by means of two connecting seams 26, while atthe same time the two webs 11, 11' are cut through between the two seams26.
FIG. 1 shows the starting position, in which the two webs 11, 11' areconnected with each other by means of a seam 26. The upper beam 15 islifted so that an object 27 to be packed or wrapped up, for example astack of newspapers or journals, may be fed in transport direction 6 viathe feeding conveying belt 1. As represented in FIG. 2 it crosses theworking station 7 and arrives on the discharge conveying belt 8 takingalong the two webs 11, 11'. The cutting knife 17 is located at leastslightly below the plane spread out by the two top runs 5, 5', in orderthat the working station 7 may be crossed freely.
When the object 27 is in the working position shown in FIG. 3 on theconveying belt 8, in which its back 28-related to the direction oftransport 6--is already on the other side of the beams 14, 15, then theconnecting device 13 is closed. To this effect the upper beam 15 drivesdownwards taking along the upper web 11'. When the two beams 14, 15 arejoined, two connecting seams 26 are formed between the two webs 11, 11'which are at the same time cut through between these seams 26. The object27 now wrapped up by web sections 29, 29' is discharged via the conveyingbelt 8, while at the same time a new object is fed via the feedingconveying belt 1.
In the diagrammatic representation of FIG. 4 the side of the machine frameA facing the viewer has been omitted for reasons of clearness.
It must further be added that all drives, i.e. in particular the electricmotors 4a, 4a', 9a, 9a' of the transport pulleys 4, 4' and of the idlerpulleys 9, 9' and the drives of the pairs of drawing-off pulleys 12, 12'and the linear drive or the linear drives 16, are triggered by an overallcontrol so that the described cycles are attained. This is realized withknown and commercially available control devices.
As a result of the punching of the strips 24, 24' and of their being guidedalong the sides of the punching teeth 21 or 38, respectively, the edges ofthe strips 24, 24' are squeezed or distorted and are thus even betterconnected.
In FIGS. 6 and 7 two beams 14, 15 with pairs of complementary punching andpressing tools 19, 19', 20, 20' are illustrated in detail as they can beused in an apparatus according to FIGS. 1 to 4. In accordance with theabove description a lower beam 14 and upper beam 15 is shown in theseFigures. In FIG. 7 each of the beams 14, 15 is shown in part as far astheir central longitudinal plane, the lower beam 14 in FIG. 7 comprisingthe only available cutting knife 17 in both partial representations. Inthe case of the upper beam the partial representation ends on the level ofthe opposite slot 18.
Each beam 14, 15 has two punching and pressing tools 19, 19' and 20, 20',respectively, as they have been shown in detail in FIG. 5. In addition,deflectors 40 associated with the respective punching and pressing tool19, 19', 20, 20' are provided on each beam 14, 15, which deflectors 40 arein the form of an oblong profile substantially U-shaped in cross-section.The deflectors' external U-legs 41 flank the longitudinal sides 48 of thebeams 14, 15 extending in parallel to the direction of engagement E of thepunching teeth 21. The internal U-legs 42 are arranged in the oppositeslot 18 of the beam 15 and in a slot 18' between the cutting knife 17 andthe beam 14, respectively. The U-base 43 of the deflectors 40 extends inthe vicinity of the punching teeth 21, the deflection webs 44 being formedbetween rectangular recesses 45 in the U-base 43 (FIG. 12). The punchingteeth 21 pass through these recesses 45. The deflection webs 44 thusengage with each interspace 22 between two neighbouring punching teeth 21.
By the two U-legs 41, 42 being guided along the longitudinal sides 48 ofthe beams 14, 15 and the opposite slot 18, respectively, and the slot 18',respectively, each deflector 40 is displaceably supported in a mannerloaded by a compression spring 47 clamped between its U-base 43 and ablind hole bore 46, which related to the longitudinal direction of thepunching and pressing tools 19, 19', 20, 20' is adjacent to the latter,against the direction of engagement E of the respective punching teeth 21of the complementary punching and pressing tools 20, 20', 19, 19'.
The deflectors 40 are further supported for displacement between anextracted and retracted stop position. The extracted stop position, as itis taken when the punching and pressing tools 19, 20 and 19', 20',respectively, are apart, is shown in the parts on the right of FIGS. 6 and7, respectively. In the parts on the left of FIG. 7 the deflectors 40 areshown in a mid-position. In the case of the retracted stop positionaccording to the parts on the left of FIG. 6 the deflectors 40 abut withtheir deflection webs 44 on the bottom of the interspaces 22, which isachieved by the depth of the engagement T of each punching tooth 21 on theone punching and pressing tool 19 and 19', respectively, with thecorresponding interspace of the complementary punching and pressing tool20 and 20', respectively, corresponding to the depth t of the interspace22 less the thickness D of the deflection webs 44. To ensure such a depthof engagement T, it is sufficient for the two beams 14, 14' to be movedinto engagement position, the engagement movement being defined by themutual abutment of the complementary punching and pressing tools 19, 20and 19', 20', respectively. The two layers of paper strips 24, 24' arethus additionally squeezed together, to that the stability of theconnecting seam is further increased by the punching process. For thepurpose of the close connection between the strips 24, 24' not beingweakened when the strips are removed from the interspaces 22, thedeflectors 40 are provided with their deflection webs 44. The latteradditionally serve to remove torn off paper scraps and other foreignmatter from the interspaces 22.
As further seen in FIGS. 6 and 7, the U-base 43 of the deflectors 40 intheir extracted position (parts on the right in FIGS. 6 and 7) is arrangedin the direction of engagement E ahead of the punching teeth 21 and in thecase of the lower beam 14 also ahead of the cutting knife 17, so that thecutting edges 23 of the punching teeth 21 and the zigzag blades 17' of thecutting knife 17 are covered in this position. It is thus avoided that anoperator is injured when servicing the packing apparatus.
As shown in FIG. 7, the travel of the deflectors 40 in their extracted orretracted stop position is defined in that the external U-leg 41 isextended and bent over at its end. This bead 49 runs in an outside groove50 on the beams 14, 15. The travel of the deflectors 40 is defined bytheir abutting on the upper and lower groove side wall 51, 52. Theengagement of the bead 49 with the groove 50 is maintained by thestrip-shaped cover 53.
FIG. 8 shows plate-shaped tool carriers 54, 55, on which complementarypunching and pressing tools 56, 57 are held. Further, two plates 58, 59and guide braces 60 are to be seen in shortened representation in thediagrammatic FIG. 8, the plates 58, 59 forming part of the machine frameA. A linear drive 16 only diagrammatically outlined for instance in theform of a piston-cylinder drive is illustrated between these plates 58, 59and the tool carriers 54, 55. The group of parts shown in FIG. 8essentially forms a working station 7' analogous with the working station7 according to FIGS. 1 to 4.
As distinguished from the apparatus shown in FIGS. 1 to 4, the punchingteeth 21 of the punching and pressing tools 56, 57 of the working station7' according to FIGS. 8 to 10 are in each case lined up to form acircumferential, closed, annular connecting seam on a circle forming thetool plane W. Again deflectors 40' are provided, which are U-shaped incross-section and provided with deflection webs 44' engaging with theinterspaces 22 between the punching teeth 21, but which form a closedcircular ring in their longitudinal extension. Analogous with thedeflectors 40 of FIGS. 6 and 7 the deflectors 40' are supported on thepunching and pressing tools 56, 57 for displacement between an extractedstop position (FIG. 9) and a retracted stop position, with the U-legs 41,42 being guided along the inside 61 and the outside 62, respectively, ofthe annular punching and pressing tools 56, 57. The stop positions of thedeflectors 40' are realized by claws 63 screwed on to the outside 62 ofthe punching and pressing tools 56, 57 and of which the ends 64 engagewith a corresponding recess 65 in the external U-legs 42 of the deflectors40.
FIG. 11 is a diagrammatic representation of an alternative packingapparatus in its entirety, the punching and pressing tools 56, 57 shown inFIGS. 8 to 10 being utilized in the working station 7'. It must be addedthat perforating knives 66, 67 are provided on the two plate-shaped toolcarriers 54, 55 outside the punching and pressing tools 56, 57 andperforate the two webs 11, 11' between two adjacent annular connectingseams. This takes place together with the punching action of the twopunching and pressing tools 56, 57 for the production of the annularconnecting seam in the working station 7'.
The packing apparatus illustrated in FIG. 11 serves to wrap up smallpieces, such as ball bearings 68, which are enclosed between two webs 11,11' surrounded by an annular connecting seam. Since the structureessentailly corresponds to the apparatus according to FIGS. 1 to 4,reference is made to the corresponding description to avoid repetition,with analogous components having identical reference numerals.