|Publication number||US3538583 A|
|Publication date||Nov 10, 1970|
|Filing date||Jul 5, 1968|
|Priority date||Jul 5, 1968|
|Publication number||US 3538583 A, US 3538583A, US-A-3538583, US3538583 A, US3538583A|
|Inventors||Longin Galockin, Walter A Glazewski, Eugene R Sitkowski|
|Original Assignee||Stone Container Corp|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (1), Referenced by (11), Classifications (12)|
|External Links: USPTO, USPTO Assignment, Espacenet|
L. GALOCKIN E AL MACHINE FOR ASSEMBLING SIFTER TOP PACKAGES Nov. 10, 1970 Filed July 5, 1968 4 Sheets$heet l NOV. 10, 1970 GALQCKIN ETAL 3,538,583
MACHINE FOR ASSEMBLING SIFTER TOP PACKAGES Filed July 5, 1968 4 Shee ts$heet 5 '32 .542 /29 2Q .nlul -62 I lllllll 56 l zgqegzezi fi /@2111?! Nov. 10, 1970 GALOGKIN ETAL 3,538,583 I MACHINE FOR ASSEMBLING SIFTER TOP PACKAGES Filed July 5, 1968 4 Sheets-Sheet 4- :QTTOENEPS United States Patent US. Cl. 29-208 17 Claims ABSTRACT OF THE DISCLOSURE A machine for assembling a partially completer sifter container or dredger for granular material prior to the filling thereof. The particular type of dredger comprises an elongate tubular body having a return-bent interior flange at one end thereof, an apertured cover member fixedly secured within said body element and a perforated sifter top rotatably engaged within said tubular body between the cover member and said interior flange, and an opposite open end for filling the partially completed container. The machine employs a plurality of work stations which perform the following assembly steps: curling of the open end of the body element inwardly to provide the interior flange; insertion of the sifter top within the body element in engagement with said flange; and insertion of the apertured cover member in frictional en gagement with the interior walls of said body element to rotatably mount said sifter top between the flange and said cover member. These steps are performed with the sifter top and cover member each oriented in a predetermined position such that upon assembly the aperture in the cover member overlies or is in registry with an imperforated portion of the sifter top whereby subsequent filling of said dredger may be performed Without the danger of granular material being discharged inadvertently through openings in the superposed sifter top and cover member. The machine is constructed to permit its stations to operate concurrently so that a tubular body is delivered to the first station, and other tubular bodies are in some stage of partial assembly and in completed partial assembly and being withdrawn from the machine during each cycle of operation of the machine.
BACKGROUND OF THE INVENTION The invention relates to automatic apparatus for assembling dredger or sifter-type dispensing containers for granular material or the like and more particularly, to an improved machine for assembling a plurality of partially completed containers sequentially which subsequently may be filled and sealed by the users of said containers.
The sifter-type containers with which the machine embodying the invention is operable generally includes an elongate tubular body element having a sealed bottom and an apertured upper cover member with a sifter top rotatably affixed in superposed relationship to said cover. The tubular body has a return bent interior flange contiguous the upper end of the body which functions in conjunction with the apertured cover member to rotatably mount the sifter top.
The normal practice in the art is for the manufacturer of the sifter top containers to supply these to the producer or filler of the granular material in a partially completed condition, i.e., without the bottom closure member in place. Thus, this bottom end is open in the partially assembled condition of the container. The filler inverts the containers for filling through the open bottom end and then seals each container by aflixing the bottom closure member thereto. Thus, it is absolutely essential that misalignment of the apertures or openings in the sifter top and the cover member be maintained during the filling operation; otherwise, the granular material will be discharged inadvertently, during filling from the container. In order to ensure the proper alignment of the sifter top and cover members, it was the prior art practice to assemble these dredges or sifter containers individually in manual steps. This manual method of assembly greatly increased the cost of production with attendant problems of manual opeartions and personnel problems.
SUMMARY OF THE INVENTION The present invention solves the problems alluded to above by providing a machine which will automatically assemble a partially completed dredger in preparation for the filling operation, while ensuring the proper alignment or orientation of the sifter top and cover member to preclude seepage of the granular material during filling. The machine utilizes a plurality of work stations, at least two of which are employed to insert the perforated sifter top and apertured cover member. The sifter top inserting station employs means which orient the per- =forated portions of each sifter top such that upon insertion they are disposed in a predetermined spatial relationship with respect to the body element of the partially completed dredger. The cover member inserting station, which receives the dredgers from the sifter top inserting station, also employs means which disposes the cover members Within the body elements with the apertures in a predetermined position, whereby said apertures Will overlie imperforated portions of the previously oriented sifter tops and the several openings in these parts will be out of registry so that granular materials cannot be discharged inadvertently.
DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a completed sifter top container with a dust cover afiixed to the upper end thereof.
FIG. 2 is an exploded perspective view of a partially completed container illustrated in an inverted position preparatory for filling.
FIGS. 3a to 3e are sectional views illustrating the progressive steps performed by the machine embodying the invention in the mass-production of the partially completed container of FIG. 2.
FIG. 4 is a schematic top plan view of a machine embodying the invention.
FIG. 5 is a sectional view taken along the line 55 of FIG. 4.
FIG. 6 is a schematic representation, partially in section, of the curling station of the machine of FIG. 4, illustrating how the interior return-bent flange is formed on the upper end of the tubular body.
FIG. 7 is a schematic representation of the sifter top insertion station illustrating the manner in which the sifter top is engaged by a plunger and positioned within the tubular body.
FIG. 8 is a schematic representation of the cover member inserting station illustrating how a cover member is sequentially punched and frictionally engaged Within the tubular body.
FIG. 9 is a schematic representation of the dust cover inserting station.
FIG. 10 is a perspective view of an actual machine embodying the invention illustrated schematically in FIGS. 4 through 9.
FIG. 11 is a perspective view of the rear of the machine illustrated in FIG. 10, and more clearly illustrating the gravity feed arrangements for the sifter top, cover member, and dust cover inserting stations.
DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIGS. 1 and 2, there is illustrated, respectively, a completed and a partially completed sifter top container with which the invention is concerned. For the purposes of convenience and clarity, the container illustrated here, irrespective of degree of completeness, will be designated generally 20.
The particular type of container 20 is comprised essentially of an elongate tubular body element 22, an upper cover member 24 having an aperture 25 formed therein, a sifter top 26 provided with dispensing perforations 27 and a pair of finger grips or protuberances 29 to facilitate turning thereof, an optional dust cover 28, and the lower or bottom closure 30. The closure member 30 is shown in FIG. 1, but is omitted from FIG. 2 since the latter is illustrative of the container formation as supplied to a filler with the closure member being supplied separately for subsequent assembly to the body 22 after filling.
While the machine embodying the invention is designed primarily to provide a partially completed container for subsequent filling, it must be understood that the invention is not limited thereto. It is contemplated that the machine of the invention may be modified to add a filling station and a sealing station for afiixing the lower closure member 30 to the body element 22 either as a part thereof or is set up therewith as part of a line.
The sequential steps for forming the partially completed dredger of FIG. 2 are illustrated in FIGS. 3a through 32. First, the uncurled tubular body 22 is subjected to a curling operation which return-bends an end thereof inwardly to define an interior curl or reversebent flange 32 illustrated in FIG. 3b. Next, the sifter top 26 is inserted into the curled body 22 in engagement with the flange 32, and thereafter, the apertured cardboard or plastic or metal disk or upper cover member 24 is inserted into the body 22 in position overlying and engaged upon the sifter top 26 as shown in FIGS. 30 and 3d. The engagement of the upper cover member 24 within the body 22 is of a frictional nature such that the sifter top 26 is rotatably mounted between the flange 32 and said cover member 24. The last step of the assembly is illustrated in FIG. 3e, and involves atfixing the dust cover 28 within the Well or space defined by the reverse-bent flange 32 and the sifter top 26. The dust cover 28, as well as the specific construction thereof, are optional features and may vary depending upon the spe cific requirements and desires of the filler.
Attention is directed to the circumstance that in the partially completed dredger 20 of FIG. 32, aperture 25 in cover member 24 is in registry with or overlies on 4 imperforated portion of the sifter top 26. If this relationship is not achieved and the respective openings 25 and 27 are aligned or in registry to any degree, upon filling, the granular material will escape and fill the dust cover 28.
Turning now to FIGS. 4 through 11, there is illustrated the automatic machine of the invention which will perform the sequential assembly steps illustrated in FIGS. 3a to 3e While ensuring the proper orientation of both the sifter top 26 and the cover member 24 so as to obviate any problems of leakage during the aforementioned filling operation.
FIG. 4 is a schematic representation of the machine of the invention, which will be designated generally 40. Machine 40 employs a plurality of work stations, the general construction and operation of which are illustrated in and will be described in connection with FIGS. 6 through 9. Machine 40 is provided with a turret and conveyor or transport arrangement 42, said turret having a plurality of stations or recesses 43 formed therein designed to receive and hold a body element 22 in various stages of assembly. 'In operation of the machine, there is employed a conventional drive arrangement (not shown) which uses a Geneva gear system driven from fractional horse-power motors through linkages for indexing movement of the turret 42. With this particular drive arrangement and gear system, the Work at the various stations will be performed simultaneously, each indexing of the turret 42 discharging a completed item.
To supply the uncurled body elements 22 to the machine an infeed conveyor 44 and a pusher 46 are used. Accordingly, as the turret 42 indexes, pusher 46 will dispose an uncurled body element 22 in upright position in one of the recesses 43 in said turret 42. It should be noted that the uncurled body element 22 is supplied to machine 40 in an inverted position, as illustrated in FIG. 2.
Continued indexing of the turret 42 will dispose the uncurled body element 22 approximate the curling station, which is designated generally as 50. At curling station 50, the upper edge of the body element 22 which is facing downwardly due to the inverted position of said element 22, is curled inwardly to form the reverse-bent flange or bead 32 shown in FIG. 3b.
The general construction of curling station 50 is illustrated schematically in FIG. 6 and includes, a reciprocal curling die 52 having an annular forming groove 54 and a heating coil 56. When the uncurled body element 22 is positioned approximate the curling station 50, one edge thereof will align with the groove 54, while the other edge is positioned to be engaged by plunger 57. Accordingly, the plunger 57 will engage the body element 22 forcing same downwardly, while the die 52 is moved upwardly by way of the pusher 58 to engage the body element. This joint movement of the plunger 57 and the die 52 exerts proper pressure on the body element 22 in conjunction with the heating effect achieved by coil 56 so as to curl the end thereof inwardly to form the flange or bead 32.
After flange 32 is formed, both the plunger 57 and the curling die 52 retract to permit the curled body element 22 to be indexed to the next work station, which is the sifter top inserting station. The sifter top inserting station is designated generally 60 in FIG. 4, and the general construction thereof is illustrated in FIG. 7.
At the sifter top inserting station 60, a sifter top 26 is disposed within the curled body element 22 in engagement with flange 3-2 by a piston 62, as shown in FIG. 30. Associated with the piston 62 is a vacuum line 63 which is connected to a source of vacuum (not shown) so that as the sifter top is positioned beneath said piston 62, the vacuum pressure will hold said top 26 in engagement with the piston 62, thus permitting proper seating of said top on the flange 32, as illustrated in phantom in FIG. 7.
The apparatus for supplying the sifter tops 26 to the inserting station 60 is illustrated schematically in FIG. 4 and can be viewed more readily in FIGS. 10 and 11. As
was discussed previously, not only must the sifter top 26 be properly seated within the body element 22, but it must be inserted such that the perforated portions 27 are in a articular orientation with respect to said body element 22. To achieve such proper orientation, the sifter tops 26 are supplied to station 60 by way of a chute 64 which is associated with a part feeding device (not shown) of the type designed to supply parts in the particular orientation. Parts feeders of the type mentioned are known in the art, and those such as produced by the Syntron Company of Homer City, Pa. are well suited for use with the present invention, it thus being deemed unnecessary to elaborate on the particular construction thereof.
Chute 64, as illustrated in FIG. 5, is comprised of an upper guide member 65 and a lower guide track 66. The lower guide track 66 is provided with an elongate channel 67 in which the protuberances 29 of the sifter tops 26 are disposed. Thus, as the sifter tops 26 move under the influence of gravity down the chute 64 along track 66, the orientation of the perforated portion 27 of each top will be the same and preferably that as illustrated in FIG. 4.
Positioned at the lowermost point of chute 64 is a reciprocal pusher 68. The pusher 68 is operated to index an individual sifter top 26 into position for engagement by the piston 62 which will then dispose said top within the body element as described above. With the particular apparatus illustrated and described, the perforated portions 27 of the sifter tops 26 will always be disposed in the same relationship with respect to body element 22, i.e., they will lie along the line 69-69.
Once the sifter top 26 is properly inserted within the body elements 22, the turret 42 will index thereby transferring the dredger to the cover member inserting station which is designated generally 70. The particular turret arrangement illustrated is an eight position unit, and accordingly, with the respective stations positioned in the manner illustrated it will take two indexing movements of the turret before the dredger 20 reaches the cover member inserting station 70. Also, it should be noted that as the turret indexes and transfers the dredger 20 from station to station, the position of a body element with respect to the turret 42 does not change so that the line 69-69 which represents the orientation of the perforations 27 will always form the same angle a with a radial line 71-71.
The cover member inserting station 70, which is illustrated in detail in FIG. 8 employs inserting means similar to that used by the sifter top inserting station 60 in that a piston 72 having a vacuum line 73 is employed to dispose the cover members within the body elements 22. In actual practice, the respective pistons 62 and 72 are ganged and the vacuum lines 63 and 73 are connected to the same source of vacuum. The vacuum line 73 maintains the cover members 24 in engagement with the piston 72 during insertion, which is extremely important since the cover member 24 is slightly oversized so that it may be frictionally engaged with the inner walls of the body 22 to wedge same in place overlying the sifter top member 26.
As was discussed previously, it is essential that the cover members 24 be inserted with their aperatures 25 in a predetremined position, namely, having their centers on a diametrical line disposed substantially at 90 degrees with respect to the line 6969. If such is the case, then proper orientation is ensured and the aperatures 25 will overlie imperforated portions of the sifter tops 26.
To ensure the proper orientation of the cover member 24 when same is supplied to the piston 72, there is associated with the piston 72 a punch or a cutter 74 which forms the aperatures 25 in the cover member. The blank or imperforate cover mombers 24 are fed to the cutter 74 from a hopper 76 by means of a pusher 78 which is also used to force the punched or apertured cover member 24 into position for engagement by the piston 72. While this feed arrangement is illustrated schematically in FIG.
4 it actual construction in a working embodiment of the invention can be seen in FIG. 11.
Accordingly, by use of the punch or cutter 74 to form aperture 25 immediately prior to disposition thereof within the body element 22, it is ensured that the aperture 25 of each cover member supplied to piston 72 will be in the same position or orientation. Taking into account the previously discussed orientation of the perforation 27 along the line 6969, by selecting the location for the punching of the apertures 25 it can be assured that said apertures will be properly aligned upon final assembly of the cover member 24 within the body element 22.
After the sifter top 26 and the cover member 24 have been assembled within body element 22, dredger 20 is then ready for filling and may be discharged from the machine. With the embodiment shown in the drawings, however, there is provided a further work station for the aflixing of the dust cover 28, said cover aflixing station being designated generally 80.
The dust covers 28 are supplied to the affixing station 80 by means of a gravity chute 82 in much the same manner as previously discussed with regard to the sifter tops 26. However, unlike the sifter tops 26, there is no need for the dust covers to be supplied in any specific orientation. Dust covers 28 are supplied individually to a point immediately below the dredger 20, as same arrives at the afiixing station 80. This is achieved by means of a separator mechanism 84 which is coupled to the overall gearing system of the machine. The separator mechanism 84 utilizes a spring-biased arm 85 and a pusher 86 which are ganged for alternate operation. Thus, as the arm 85 is retracted to permit one of the dust covers 28 to move doWn the chute 82, the pusher 78 is advanced to engage the said dust cover and move same into a position immediately below the dredger 20. The movement of the dust covers 28 along chute 82 may be facilitated by the use of an airjet supplied by the conduit 87.
Referring now to FIG. 9, the means for afiixing the dust covers 28 to the dredger 20 is illustrated. At the dust cover aflixing station 80, there is provided a piston or plunger 88 having an upper planar surface 89 which receives the dust covers 28 from the pusher 86. Once received in the position illustrated and with the dredger 20 positioned approximate affixing station 80, the dust cover 28 will align with the well defined by interior flange 32 and the sifter top 24 of said dredger whereby upon operation of the piston 88 said cover may be fixed thereto.
Upon indexing of the turret 42 after the dust cover 28 has been afiixed, dredger 20 will be engaged by a spring arm 90 which is eifective to remove the partially completed dredger from the recess 43 in turret 42. As the dredgers 20 are removed from the turret 42, they will be received by a discharge conveyor 92 for trans portaiton from the machine 40.
In FIGS. 10 and 11, which have been alluded to previously in conjunction with the description of the schematic illustrations of FIGS. 4 and 9, there is shown an actual embodiment of a present invention with the various elements thereof bearing the same reference character as the corresponding parts of the previously discussed schematic representation. The machine or embodiment of FIGS. 10 and 11 is designed to perform the sequence of operations illustrated in FIGS. 3a through 32. In addition, the apparatus at the various stations is adjustable so that dredges of various sizes may be accommodated. In addition, the machine 40 employs an eight position arrangement, with room for additional stations, it being intended that said machine may be adapted for other operations such as the filling and sealing of said dredgers.
While the invention has been described in conjunction with the accompanying drawings, it is envisioned that means equivalent to those described and illustrated may be employed to perform the sequential steps described above Without departing from the spirit and scope of the invention. In addition, it is also envisioned that one or more of the discussed stations or operations may be omitted, for example, the body elements may be precurled prior to being supplied to said machine, thus eliminating the need for the curling station; or the dust cover affixing station may be omitted depending entirely upon the users requirements.
What it is desired to be secured by Letters Patent of the United States is:
1. A machine for automatically and sequentially assembling a plurality of like dispensing containers into a partially complete condition for thereafter being filled with granular material or the like, each container comprising an elongate tubular body having a return-bent interior flange at one end thereof, an apertured cover member secured within said body portion, and a perforated sifter top rotatively engaged 'within said body element between the cover member and said interior flange, and an opposite open end, said machine comprising: a curling station means for providing the interior flange on the said one end of a tubular body; a sifter top station including means for inserting the sifter top within a said tubular body in engagement with said interior flange, said sifter top station means including orienting means for positively positioning said sifter top with its perforations in a predetermined spatial relationship relative to the tubular body; and a cover inserting section including means for engaging an apertured cover member with in a tubular body in superposed relationship with respect to said sifter top and with the aperture therein in registry with an imperforate portion of said sifter top, whereby a partially completed container may be filled through said open end without the granular material being discharged through any of the openings in the superposed sifter top and cover member respectively of a container while being filled.
2. A machine as defined in claim 1 and further including a dust cover station having means for afiixing a dust cover to overlie said one end of a tubular body with its assembled cover member and sifter top.
3. A machine as defined in claim 1 wherein said sifter top inserting means includes a piston which engages and seats said sifter top within the tubular body in engagement with said interior flange.
4. A machine as defined in claim 3 wherein said piston includes vacuum means for maintaining the engagement between the piston and the sifter top during the inserting step.
5. A machine as defined in claim 1 wherein said orienting means includes a track over which said sifter tops travel, said track having an elongate groove extending along its length for receiving protuberances formed on said sifter tops at preselected locations, whereby to positively position the perforated portions of each sifter top similarly oriented with respect to each tubular body in which the same is inserted by said sifter top inserting means.
6. A machine as defined in claim 1 wherein said cover inserting means includes a piston operable to force the cover member into the tubular body with the marginal edges of the apertured cover member in frictional contact with the interior walls of the tubular body.
7. A machine as defined in claim 6 wherein said piston includes vacuum means to maintain engagement between the piston and the cover member during disposition of said cover member in said tubular body.
8. A machine as defined in claim 1 and in combination, further including cutter appaartus associated with said apertured cover member inserting means, said cutter apparatus operable to form the aperture in said cover member immediately prior to insertion thereof into said tubular body and at a predetermined location whereby said cover member will be so positioned with respect to the 8 previously oriented sifter top that said aperture therein overlies an imperforate portion of said sifter top.
9. A machine as defined in claim 1 wherein said curling station means includes a die having an annular forming groove, and a plunger for forcing said one end of the tubular body into said groove to curl said end inwardly thereby defining said interior flange.
10. A machine as defined in claim 9 and including a heating means associated with said die to facilitate the curling operation.
11. A machine as define in claim 1 including conveyor means for delivering tubular bodies to the stations of the machine and for removing the partially completed containers.
12. A machine as defined in claim 1 in which each station is operated concurrently in a mass-production type operation.
13. A machine as defined in claim 1 in which said sifter top inserting means and aperture cover inserting means are ganged for concurrent operation.
14. A machine for automatically assembling a partiall completed dredger for granular material or the like, said dredger including an elongate tubular body element having an interior flange on one end thereof, a cover member having an aperture formed therein and being frictionally disposed within said body element, and a perforate sifter top disposed in engagement with said flange and interposed between said apertured cover member and said flange, whereby said sifter top may be rotated to align the perforated portions thereof with said aperture to permit dispensing of the granular material, said machine comprising: means for inserting a sifter top within a body element having an interior flange formed on one end thereof, said means including apparatus to align and orient said sifter top such that the perforated portions thereof are in a predetermined position with respect to said body element upon insertion of said sifter top therein, and additional inserting means for disposing the aperture cover member within the body element and in engagement with the sifter top, said additional inserting means orienting the apertured cover member with respect to the body portion such that the aperture formed therein overlies an imperforated portion of said sifter top, whereby said dredger may be filled subsequently without danger of the granular material escaping through aligned openings in the superposed sifter top and cover member.
15. A machine for automatically assembling a partially completed dredger for granular material or the like, said dredger including an elongate tubular body element having an interior flange on one end thereof, a cover member having an aperture formed therein and being frictionally disposed within said body element, and a perforate sifter top disposed in engagement with said flange and interposed between said apertured cover member and said flange, whereby said sifter top may be rotated to align the perforated portions thereof with said aperture to permit dispensing of the granular material, said machine comprising: means for providing an interior flange on one end of the body member, means for inserting the perforated sifter top within said body member in engagement with said interior flange such that the perforated portions thereof are oriented in a predetermined relationship with respect to the body element, and means for inserting the apertured cover member frictionally within the body portion in engagement with the sifter top and in a predetermined orientation with respect to said body element, such that said aperture formed therein overlies an imperforated portion of the sifter top.
16. The machine as defined in claim 15 further including conveyor apparatus for transmitting the partially assembled container from one of said means to the other.
17. A machine for partially assembling a dredger prior to the filling thereof with a granular material, said dredger comprising an elongate tubular body element having a reverse-bent interior flange formed on one end thereof,
a cover member frictionally disposed in said body element and having a dispensing aperture formed therein, and a perforated, relatively rotatable sifter top disposed between said flange and said apertured cover member, said machine comprising: a curling station including a die for forming the reverse-bent flange on one end of the embodied element, a sifter top inserting station including means for disposing a sitter top Within the body element in engagement with the reverse-bent flange, said means including apparatus for orienting said top such that the perforated portions thereof are disposed in a predetermined relationship with respect to the body element, a cover member inserting station including means for frictionally engaging a cover member Within the body element in a contiguous predetermined relationship with respect to said sifter top such that the apertures formed in said cover member overlies an imperforated portion of the sifter top, and a dust cover afiixing station including means for assembling a dust cover on said embodied element to overlie and block said one end thereof, and a conveyor means for transporting the partially completed dredgers from one station to the other, said conveyor means including infeed and discharge apparatus.
References Cited UNITED STATES PATENTS 3,374,605 3/1968 Satchwell et al.
THOMAS H. EAGER, Primary Examiner US. Cl. X.R. 29-211 zg ggg UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION 3,538,583,- Dated November 10, 1970 Patent No Invencofls), Lohgfn Galo'ekifi, 'w alterfiu- G1azewski',.Eugene R-. S'itkowki it 1s -c'er ti'f 1ed 113: error appears in the above ident'ifled' petent and that said Le tter ze Pateht are hereby-oon-ectedas shown below:
Colfiinn 1., line 14,. before "si'fter change -"comp1eter" to ----.c'omp1ete' d- Column 5,' line 49, before."within-" change "25'? to "24; Column 5, line 71, after ".cpver'Ychange "members"; to -'--members---; Colunm 6,1'11ne 1, before "Factual." change "it"fto --its- Column 6, lines 54 and 55, after T'for" ohan'ge ;'-'tran sporta1 ton7" e 'to.---i:tr:an53- 50rtation' Co1umn'7, claim 1,v1in e'"28,, after. "'i nelerti'pg'j c h agg e "sectiori'" to s1: at1on I I.
Column 7, cleim 8Q'11ne70, after "cutter" change "appa artus"' to Column-8', claim 11, line .11 after '-.'as" change "define" to 9, line 16, delete- "s" after "apertures".
mi? 5 ZEZHLED JFebuar'y 9 1971 m 1:. mm, m- I 1; ts
ttening Offioer winner of Pa on
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|U.S. Classification||29/564.1, 29/773, 29/790, 29/785, 29/564.7|
|International Classification||B21D51/26, B31B17/00|
|Cooperative Classification||B31B17/00, B31B2217/082, B21D51/2653|
|European Classification||B31B17/00, B21D51/26D|