US2307142A - Method of and apparatus for superposing and severing webs - Google Patents

Description

H. E. LEE

Jan. 5 1943.

METHOD OF AND APPARATUS FOR SUPERPOSING AND SEVERING WEBS I Filed Oct. 25) 1941 2 Sheets-Sheet l HARRY E LEE f: bNW. m.

J 5, 9 3- H. E. LEE 2,307,142

METHOD OF AND APPARATUS FOR SUPERPOSING AND SEVERING WEBS Filed Oct. 25, 1941 2 Sheets-Sheet 2 HARRY E .LEE

' Patented Jan. 5, 1943 I METHOD OF AND APPARATUS FOR 8UP- POSING AND SEVEBING WEBS Harry E. Lee, Oswego, N. Y., assignor to St. Regis Paper Company, New York, N. Y., a corporation of New York Application October 25, 1941, serial No. 41am 6 Claims. (01. 210-52) This invention relates to a method of andapparatus for superposin'g and severing webs. More-particularly, it relates to a method and device of this kind where the webs are to be formed into a tube" and the tube severed into lengths suitable for the formation ofmulti-plybags with at least portions of the ends of the plies severed at different lengths.

'The object of the invention is to provide a method and means whereby webs may be superposedand perforated or out along common lines and then shifted so that the lines are staggered relative to each other in order that the webs when finally separated will have staggered edges. Where it is desired that the severed edges of the webs will be staggered at certain portions differently from their staggering at other portions, the process may be repeated.

Details of the invention and minor objects will appear as the description proceeds.

In the drawings forming a part of this application means, indicated at 28, for vertical adjustment. I

Web I! in similar manner is guided beneath roller 24 which likewise is mounted for vertical adjustment by suitable means 25. and '24 webs II and I2 are brought together over guide roll 25 and together with web to are drawn over grid i'l where they may be perforated along such portion of the width as desired by a rotatable carrier 28 which carries a cutter or perforator 29 similar to perforator II.

From grid 21, webs i0 and II are guided under roller 3| and thence upward. Web ID is carried up over guide roll M, which is mounted by a suitable means 33 for vertical adjustment. From thence, web to is led beneath guide rolls 34 and 35.; A paste pan 38 is provided beneath guide Rig. 1 is a diagrammatic side view of apparatus As arranged;

there is an upper web l0, anintermediate web j H and a lower web II. It will be readily understood that the number of webs may be decreased or increased as desired with appropriate additions or omissions in the apparatus.

At theleft of Fig. 1, the three webs are shown as being drawn from any desired source which usually will be large rolls of paper. The webs are brought together over guide roll I! and then drawn insuperposed relation, as indicated at l4, to over a grid II. Above the grid ll, there is g cutter support It which carries a perforating knife I! having teeth ll adapted to enter between the bars I! of grid Ii, as clearly indicated in Figs. 2 and 3. By this means, perforations' are produced through the superposed webs of paper along such portions of the width as desired. 7

. m the formof device disclosed, web in rolls 34 and 36 and a glue roll 31 transfers the glue, paste or other adhesive in pan 36 to a paste pad 38 mounted upon a suitable carrier 39. 1

In a similar manner, web I! is carried up over roller 4| mounted for vertical adjustment by means of a suitable mounting 42 and beneath guide rollers 43 and 44. A pan 45 is located beneath rollers 43 and 44 and is provided with a transfer roller 46 for transferring adhesive to paste pads 41 upon a suitable carrier 48.

Web It is led downward around guide roll 50 and beneath guide roll 5! which is mounted for vertical adjustment by suitable means 52. The web is led upward from adjusting roll 5| over guidevroll 53 and beneath guide roll 54. From rolls 35,44 and 54, respectively, webs In, H and I! are drawn over a guide roll 40 from which they are led together, as indicated at 55, to a suitable tubing machine where they may be formed into a tube, after which the'completion of the severance may be .eifected.

It will be readily apparent that, after lines have been perforated by perforating device l'l,

webs and It will be retarded in successive degrees with respect to web I. so that, when they reach grid 21, the lines perforated over grid It will be shifted with respect .to each other. Thereupon, device 29 may perforate the webs along the desired portion.

Thereafter by proper adjustment of the rolls I 32, 4! and BI, the length of the paths from grid 21 to roller 40 may be so adjusted that when the webs reach roller 40 the-perforated lines will have 50.

is drawn in a-substantially straight line from the desired relation one to another. Pads 38 and 41 are arranged to apply vadhesive to the webs so that, when superposed over roller 40, they will be adhered together for subsequent manipulation.

It will be readily seen that,-by apparatus of this construction, the portions of the webs which From rollers 22 are perforated by members I? and 29 may be vindicate diagrammatically one arrangement which may be made which will take advantage of this apparatus to produce successive bag lengths having ends suitable for being closed by the usual pasting operation and having their side flaps stepped oppositely so that each ply of each side flapwill be adhered 'to the corresponding ply of the other side flap.

The operation of the device may be described in connection with the diagrammatic views.

In Fig. 4, there is a plan view of the superposed webs Ni, ii and I2 as they leave grid II. It will be seen that they are stepped laterally for convenience in adhering their edges together subsequently to form a multi-ply tube. It will be seen at the top of Fig. 4 that there is indicated a line of perforations 60 in web I0, 6! at the edge of web II, and 62 at the edge of web i2. It will be readily understood that the perforations extend through all webs so that perforated lines GI and 62 extend down as far as line 60. Similarly, at the bottom of Fig. 4, there is a similar row of perforations, but in this case, the row 63 in the upper web it is longer than the rows 64 and 65 in the lower webs. Fig. is a diagrammatic plan view of the webs as they leave grid 21. Webs ii and I2 are retarded relatively to Web ID so that when again superposed over grid 21, lines 8| and .62 and 64 and B5 are retarded to successive degrees behind lines and 63 in the upper web iii. By means of member 29,'there is pro-- duced another line of.perforations, indicated at Fig. 6 is a diagrammatic plan view of the relation of the webs and their perforations as they leave roller 50. Between grid 21 and roller 40 in the construction shown the webs l0 and H are retarded somewhat with respect to web l2 so that the row of perforations 66 in web It is behind the row 66 in web II, and row 56" in web l2, these three rows having been formed simultaneously by member 29. It will be readily seen that if the superposed websare then foldedv into a tube with their edges adhered along a median longitudinalline of the tube, the unperforated portions of each web will come at the. edgesof As indicated above, it will be readily understood that by variation in the portions of the web which are perforated by the respective perforating members and variation in the shifting of the webs after the flrstperforation and after the second perforation, if desired, the final pattern may be varied widely, the one indicated in Figs. 4, 5 and 6 being merely one pattern which has been found desirable for certain purposes.

It will be readily understood also that where the desired pattern at the end of the tube is more simple, only one shifting of the webs may be necessary after the perforating operation. For example, if it was satisfactory to step both side flaps in the same direction, the single perforatins operation with subsequent shifting of the webs would accomplish this purpose. 0n the other hand, more complicated designs could be produced by introducing extra shifts as to one or more webs and in the construction it will be readily seen that two or more webs might be guided together through any one or more of the desired shifts. For example, if it should be desired to shift one of the webs with respect to the others in order to produce an extending portion of one ply only at a part of the end of the bag, this could be done readily by perforating that portion of the bag with the webs superposed and then shifting the single web with respect to the other webs the desired distance.

While means have been indicated for applying paste to certain portions of the adjacent surfaces of the plies during the final shifting so as to adhere them together, it will be readily understood that this means may be varied in accordance with the pattern desired, and may be omitted if not found necessary. a

It will be readily seen that by this method and apparatus, there has been devised an arrangement wherein a single perforating member may be employed for simultaneously perforating as many webs as desired, and at the same time, the perforations in the webs may be shifted relative to each other in the final tube to the degree desired simply by adding the desired guide rolls and the tube when the tube is collapsed. In this case,

the tube may then be run under a cutting apparatus and all webs cut off squarely across the lines indicated at 67 and slit along lines indicated at 58. It will be understood, of course, that after the cutting of the paper along lines 31 and S8, suitabletension may be placed upon the tube so as to tear the webs along the respective lines of perforation so as to complete the severance of the tube.

'I'hereupon, it will be seen that the corners of the bags will be severed along lines which form continuations of perforated lines 6| and 66' while the web it will extend a longer distance in one of the side flaps up to lines 6D and 63 while it will be shorter on the other side flap, terminating at line 66. Conversely, web II will be cut off shorter at line 62 and on the side flap where web l0 extends the farthest, whileweb l2 will extend to line 86" on the side where web i0 is the shortest. In this way, the two side flaps will be stepped in opposite'directions. i

adjusting them as required.

What I claim is: a

1. Apparatus for perforating webs comprising means for superposing a plurality of webs, means for advancing the superposed webs, means for perforating the webs along at least a portion of a line transverse to the line of movement of the webs, means for separating and again superposing the-webs, and means for adjusting the lengths of the individual paths of the webs between such separation and second superposition.

2. In apparatus for perforating elongated webs of paper, means for superposing the webs and moving them forward longitudinally of the webs.

means for perforating a portion of the webs transversely of the line of movement, means for thereafter separating and again superposing the webs a plurality of times, means for adjusting the lengths of the individual paths of the webs between each separation and resuperpositioning, I

and means for perforating an additional portion of the webs transversely of their line of movei231; at each successive superposition except the 3. Apparatus comprising means for su o a plurality of webs of paper, means ran 13:

perforations through the superposed webs along a certain line, means for then separating the webs, and means for applying adhesive to a surface of one of the separated webs that is towards another of the webs, and means for again superpositioning the webs with the lines of perforations shifted and with the adhesive uniting the webs in said shifted position; v-

4. The method of perforating webs of paper which comprises superposing a plurality of webs, producing perforations along certain lines through the superposed webs, thereafter separating the webs, shifting them with respect to each other, and again superposing them with the perforated lines shifted respectively from each other. 5. A method which comprises superposing a plurality of webs of paper, producing perforations through the superposed webs along a certain line.

separating the webs and again superposing them with the lines of perforations shifted with respect to each other, and again perforating the superposed webs along another line, again separating them, and again superposing with the perforations along said other line shifted with respect to eachother.

6. The method which comprises superposing a plurality of webs of paper, forming perforations

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