US2094415A - Paper pleating machine - Google Patents

Description

Sept. 28, 1937. F. SCHWARTZ 2,094,415

I PAPER PLEATING MACHINE I Filed May 6, 1955 4 Sheets-Sheet 1 Sept. 28, 1937. F. SCHWARTZ 2,094,415

- PAPER PLEATING MACHINE Filed May 6, 1955 4 Sheets-Sheet 2 1.1," III I Sept/28, 1937. F. SCHWARTZ PAPER PLEATING MACHINE 4 Sheets-Sheet 5 Filed May 6, 1955 Sept. 28, 1937. W T 2,094,415

PAPER PLEAT ING MACHINE Filed May 6, 1955 4 Sheets-Sheet 4 g Q "-flL I'LHIIL \l l J amen WM W P p Patented Sept. 28, 1937 UNITED STATES PATENT} OFFICE PAPER PLEATING MACHINE Fred Schwartz, Green Bay, Wis., assignor to Fort Howard Paper Company, Green Bay, Wis., a

corporation of Wisconsin Application May 6, 1935, Serial No. 20,064

3 Claims. (01. 154-30) 10- vide a machine for pleating paper by the use of elastic belts succeeded by forming devices and pressure rolls to finally complete the pleats.

Further objects of the invention will appear from the following description when read in connection with the accompanying drawings showing an illustrative embodiment of the invention, and wherein:

Figure 1 is a plan view;

Fig. 21s a vertical section on line 22 of Fig. 1;

Fig. 3 is a plan view of a portion of a pleat designed to coact with the elastic belts;

Fig. 4 is a perspective view of one of the final pleating blocks;

Figs. 5, 6, 7, 8, and 9 are detail transverse sections on the corresponding section lines of Fig. 2;

Fig. 10'is a side elevation illustrating the roll driving mechanism; and

Fig. 11 is a detail cross section of the paper produced by the machine.

As shown the device comprises a pair of corrugated rolls I2, I3 mounted in standards I4, one of said rolls being provided with a sheave I5 by which the device is driven, and the rolls I2, I3 provided with interengaging gears I6 for drive of the roll I2 from the roll I 3. There are also provided upper and lower rolls I1, I8, and I9, 20, which are corrugated with the same number of corrugations as those of the rolls I2, I3, but in which the corrugations are more closely spaced than in the first named rolls. The respective pairs of rolls I2, I3, I1, I8, and I9, 20, have their adjacent surfaces in alignment.

Mounted to travel in the corrugations 2I, 22 of the rolls, there are shown belts 23, 24. The belts for the upper and lower rolls respectively are shown as staggered. Because of the fact that the corrugations 2| and 22 in the rolls l1, I8, and I9, 29 are more closely spaced than those of the rolls I2, I3, a web of paper 25 fed between the belts upon the rolls I2, I3 .will have its width reduced in its travel from rolls I2, I3 to the rolls I1, I8.

To guide the paper during its width-narrowing travel, there are shown upper and lower corrugated plates 26, 21 having corrugations to receive and guide the belts 23, 24 and the paper extending over and under the successive belts transversely of the machine.

The plates 26, 21 are shown as mounted in the standards I4 and the standards 28, 29, the lat- 5 ter supporting the rolls I1, I8 and rolls I9, 20 respectively by means of brackets 30, 3| respectively and provided for necessary adjustment toward and from each other by slotting of the vertical portions of the brackets.

The paper leaving the rolls I9, 20 is immediately received between spaced vertical pleating blocks 32, 33 which are similar and placed in staggered relation as by being mounted upon rods 34, 35 supported between brackets 36, 31, Fig. 1, for vertical adjustment. The blocks 32, 33 are shown as rounded at 38 at the paper entering ends thereof, which rounded form tapers to a flattened form at 39, see Fig. 4. The blocks 32, 33 may be adjusted for spacing upon the rods 34, 35 by loosening set screws 40, 4i and moving the same upon the rods in an obvious manner. A pair of press rolls 42, 43 are mounted in standard 44 closely adjacent the flattened ends of the blocks 32, 33 so that the paper leaving said blocks is immediately received in the bite of the rolls and pressed to the final form illustrated in Fig. 11.

It will be seen from Fig. 9 that the pleating blocks 32, 33 have their flattened ends 39 lying in such relation as to bring the paper to the final pleating form ready for operation thereon by the press rolls 42, 43.

The pairs of rolls i1, I8, I9, 20, and 42, 43 are driven from each other by inter-engaging gears 35 45, 46, 41, respectively. The roll I2 is driven from the roll I3 in the manner already described. The roll I1 is driven from the roll I2 by means of a sprocket chain '48. The roll 20 is driven from the roll I8 by means of a sprocket chain 49. The 40 roll 42 is driven from the roll I9 by means of a sprocket chain 50.

The brackets 36, 31 are shown as supported from a standard 5|.

It is to be understood that the paper taken from 45 the feed roll 52 is preferably previously corrugated and after running through the machine it may be wound upon a storage roll 53.

The belts 23, 24 are preferably formed of helically wound resilient wire and are placed upon the rolls under tension.

The function of the rolls l1, I8 is to give a straight line parallel travel of the belts 23, 24 at the last end of their path in contact with the paper whereby the corrugations of the paper are finally straightened ready for action thereon by the blocks 32, 33.

The rolls I1, 58 may be omitted if desired without rendering the device inoperative.

5 Because the belts 23, 24 are elastic and are under some degree of tension, they will faithfully follow the corrugations of the rolls l1, [8 in passing from converging paths to parallel paths.

The paper may be treated in dry and its per- 13 centage of possible stretch will be the difference between the length of the rolls [2, l3 and that of the rolls i9, 20.

Minor changes may be made in the physical embodiment of the invention within the scope of 15 the appended claims without departing from the spirit thereof.

I claim: 1. In a machine of the class described, in combination: a plurality of pairs of upper and lower grooved rolls comprising upper and lower sets; the grooves in the paper-entering pair more widely spaced than and of the same number as the grooves of the succeeding rolls; the grooves of the second and third pairs equally spaced; upper' and lower sets of endless bands mounted in altermate of said grooves of the upper and lower sets of rolls; grooved plates to guide said bands from the first to the second pairs of rolls, said grooves converging toward the rolls of said second pair;

whereby a sheet led between said upper and lower sets of bands will be given a transversely undulant form progressively decreasing in width to the sec- 0nd pair of rolls and straightened to the third pair; means to receive the undulations and pro gressively guide portions thereof into overlapping relation with other portions thereof; and a press roll to compress the thus formed fold lines.

2. A paper pleating member comprising an elongated block, convex at one edge at one end thereof, said edge progressively flattening to a plane surface at its remaining end; said last named end having portions projecting beyond the side surfaces of the block adjacent said plane surface to provide abrupt shoulders at the said pro jections.

3. In a machine of the class described, in combination: means to deform a moving sheet of paper into longitudinally extending rounded corrugations; upper and lower opposed sets of pleating members at the opposite sides of the path of said moving sheet; each of said members comprising a block set edgewise to said path and the edges thereof each convex at the paper entering end of the sets; said edges progressively flattening to plane surfaced edges at the delivery end thereof and progressively widening to portions projecting beyond the side surfaces of the members providing overlapping shoulders upon the opposed members of the sets; said shoulders on each set spaced from the opposed shoulders a distance substantially equal to-the thickness of the sheet, and means to press the resulting pleats.

FRED SCHWARTZ.

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