US2054833A

US2054833A - Apparatus for making bags

Info

Publication number: US2054833A
Application number: US753820A
Authority: US
Inventors: Potdevin Adolph
Original assignee: Potdevin Machine Co
Current assignee: Potdevin Machine Co
Priority date: 1933-09-06
Filing date: 1934-11-20
Publication date: 1936-09-22
Anticipated expiration: 1953-09-22

Description

Sept. 22, 1936. I A? PQTDEV|N 2,054,833

APPARATUS FOR MAKING BAGS Original Filed Sept. 6, 1933 ATTORN EYS Patented Sept. 22, 1936 PATENT OFFICE 2,054,332 APPARATUS roa MAKING BAGS Adolph Potdevin,

assignor to lyn, N. 1..

Garden City, Potdevin Machine Company, a corporation of New York Long Island, N. Y.,

Brook- Original application September 6, 1933, Serial No.

688,279. Divided and her 20, 1934, Serial No.

13 Claims.

This invention relates to improvements in apparatus for making bags and is particularly well adapted for making bags from material such as cellulose acetate, cellulose hydrate, glassine, and- 5 like materials, as distinguished from paper.

In the accompanying drawing:

Fig. 1 is a plan view somewhat diagrammatic of an apparatus constituting one embodiment of my invention;

Fig. 2 is a side Fig. 1; and Figs. 3,4 and stages of its manufacture.

Referring to the drawing in detail: The ma- 15 terial is taken from a supply roll I and the web. designated 2, is led about av roller 3 and past plates 4 which are adapted to fold the opposed edges of the web over toward each other upon the main body of the web to form flanges 5 at opposite sides of the web.

The web then passes between rollers 5 by which the flanges are turned outwardly again so that the web is once more flat. I

r In its flattened condition the web passes note ing mechanism comprising notchers 1 and 5 at each side of the web and adapted to notch the web as shown at 9 and ill. The notchers 1 and 8 are mounted on the same shafts.

The notchers I and 8 are held to their supporting shaft II by screws l2,'so that the spacing of the notches 9 and I lengthwise of the web 2 may bevaried to s 't different conditions.

The web still in opened-up or flat condition then passes about rollers l3 and I4 to bring the flanges of the web into contact with adhesiveapplying discs l5.

These adhesive-applying discs as seen from Fig. 2 are segmental so that alternate flanges 5 have the adhesive stripes it applied thereto. words, the flanges to one side of one pair of opposed notches 9 will have adhesive applied thereto, while the adjacent flanges at the other side of these. notches will be left plain.

The'discs l5 are made adjustable as II to vary the length of their periphery. v The web next passes plates l8 which are adapted to turn the flanges 5 which have had adhesive applied thereto inwardly again, so that these flanges will be pasted'down to the body of the web 2.

To insure that only alternate flanges will be turned inwardly again, I provide rocking flngers l9 intermediate the roller I4 and plates i5, these fingers which engage the web along the line of the 55- fold which provides the flanges 5 being so timed in elevation of the apparatus of shown at 5 show the bag in the various In other as which told this application Novemthat the leading end of a pair of pasted flanges will be directed above the end of the plates ll, 'while the leading end of the succeeding pair of flanges will be directed below these plates.

The web next passes between rollers 20, past 5 cutting off mechanism 2| and between rollers 22 and 22.

The cutting of! mechanism comprises a rotary cutter bar 2| driven in the direction of the arrow on Fig. 1 cooperating with a flxed member 25. 10 The function of this cutting of]? mechanism is to sever the main body of the web transversely, across opposed notches I! but an appreciable distance to one side (to the right as viewed in Fig. l) of the center of these notches so as to leave a rela- 5 flapv designated 26 in Fig. 1 on the trailing edge of the cut of! portion and a relatively short flap 21 at the leading edgeof the adjacent section of material.

Each length of material, therefore, is approxi- 2o mately double the length of the finished bag and as shown in Fig. 1 is composed of what I shall term two panels designated 25 and 29, respectively, the flanges 5 of the panel 28 being turned inwardly over upon the body ofthe web 2 to which 20 they are pasted, whilethe flanges 5 on the panel 30 are in an opened up condition.

The length of material shown at the left in Fig.

1 passes from the rollers 23 to forwarding and creasing rollers 30 and II. The roller 30 is pro- 30 vided with a creaser blade 32 and the roller 2| with a gripper .33. controlled by a cam 2|. The setting and timing of these two rollers 25 and 2| are such that the creaser blade 32 engages the web substantially along the line of Fig. l to 35 force the web downwardly with respect to the l the gripping flnger 33 may func- Continued rotation of roller and between face of a roller 35 lying adjacent the two panels lengthwise of the web, over upon each other as illustrated in Fig. 3.

In this condition the inner facesot the flanges 5 of the panel 29 are contacted with gluing discs 36 which apply adhesive theretoas shown at 21 in Fig. 4. 1

The folded material then passes between rollers 32 and finally between a pair of superposed belts the flanges 5 of panel 29 over upon the panel 25 as shown in Fig. 5 which completes the bag.

While I have illustrated and described one. embodiment of my invention I do not wish to be limited to the precise structure herein shown and 5 creases the notches of described as obviously various modifications and changes may be made therein without departing from the spirit and scope of my invention.

This application is a division of my copending application Serial No. 688,279 filed September 6, 1933.

What I claim is:

1. A bag making machine comprising in combination web-advancing means and a pair of rotary notchers at opposite sides of the machine rotatable about axes parallel to the direction of travel of the web, the notchers of each pair being offset with respect to each other so as to provide pairs of notches in the opposed edges of the web, the notches of each pair being half a bag length apart.

2. A bag making machine comprising in combination web-advancing means, creasing means for providing longitudinal creases adjacent the edges and a pair of rotary notchers at opposite sides of the machine rotatable about axes parallel to the direction of travel of the web, the notchers of each pair being ofiset with respect to each other so as to provide pairs of notches in the opposed edges of the web in line with said each pair being half a bag length apart.

3. A bag making machine comprising in combination web-advancing means, a pair of rotary notchers at opposite sides of the machine rotatable about axes parallel to the direction of travel of the web, the notchers of each pair being offset with respect to each other so as to provide pairs of notches in the opposed edges of the web, the notches of each pair being half a bag length apart, and cutting off mechanism for severing the web adjacent alternate pairs of notches into sections substantially twice the length of bag lengths.

4. A bag making machine comprising in combination web-advancing means, a pair of rotary notchers at opposite sides of the machine driven about axes parallel to the direction of travel of the web, the notchers of each pair being offset with respect to each other so as to provide pairs of notches in the opposed edges of the web at substantially a half bag length apart, and means for adjusting the setting of the notchers to vary the distance between notches thereby to accommodate the machine to bags of different lengths.

5. A bag making machine comprising in combination web-advancing means, a pair of rotary notchers at opposite sides of the machine driven about axes parallel to the direction of travel of the web, the notchers of each pair being offset with respect to each'other so as to provide pairs of notches in the opposed edges of the web at substantially a half bag length apart, means for adjusting the setting of the notchers to vary the distance between notches thereby to accommodate the machine to bags of different lengths, and cutting off mechanism for severing the web into sections having opposed notches substantially midway of its ends.

6. A bag making machine comprising in combination web-advancing means, means in the path of the advancing web for turning the edges of the web inwardly to provide side flanges and then to restore the web to flat condition again, paste applying means for applying spaced stripes of adhesive to the upper face of said side flanges, pairs of notchers at opposite sides of the machine for notching the edges of the flat web at predetermined intervals to provide panels in the web the flanges of alternate panels being pasted,

means following the notchers for refolding the edges of pasted alternate flanges over on the body' length of web substantially twice a bag length with a pair of opposed notches substantially midway of the length.

7. A bag making machine comprising in combination means for applying paste at intervals along the opposite edges of a traveling web, notchers for notching the opposite edges of the web at. each end of the paste areas, folding mechanism for turning the pasted edges of the web inwardly upon the main portion of the web on further advance of the web, cutting-off mechanism for severing the web transversely at the leading end of each pasted area, rotaryadvancing or forwarding means for advancing the severed lengths, and clamping mechanism carried thereby for gripping a severed length midway of its length so that the severed length will be deflected out of its previous path of travel and be drawn between two rollers to fold the length transversely to bring the portions of the length at each side of the transverse fold into parallelism.

8. A bag making machine comprising in combination means for applying paste at intervals along the opposite edges of a traveling web, notchers for notching the opposite edges of the web at each end of the paste areas to provide opposed alternately pasted and unpasted flanges folding mechanism for turning the pasted flanges inwardly upon the main portion of the web on further advance of the web, cuttingofl' mechanism for severing the web transversely at the leading end of each pasted area, rotary advancing or forwarding means for advancing the severedlengths, clamping mechanism carried thereby for gripping a severed length midway of its length so that the severed length will be deflected out of its previous path of travel and be drawn between two rollers to fold the length transversely to form two superimposed panels, paste applying means for applying paste to the unpasted flanges, and means for folding the last-mentioned flanges over on the outside of the opposed panel to paste the same thereto.

9. A bag making machine comprising in combination web-advancing means, pairs of notchers mounted on shafts at opposite sides of the machine for notching the edges of the web at predetermined intervals to provide flanged panels in the web which are to eventually form the walls of the bag, the notchers of each pair being adjustable circumferentially on their supporting shaft relatively to each other to vary the spacing of the notches in the web, cutting oil. mechanism for severing the web transversely adjacent alternate pairs of opposed notches.

10. A bag making machine comprising in combination web-advancing means, pairs of notchers mounted on shafts at opposite sides of the machine for notching the edges of the web at predetermined intervals to provide flanged panels in the web which are to eventually form the walls of the bag. the notchers of each pair being adjustable circumferentially on their supporting shaft relatively to each other to vary the spacing of the notches in the web, cutting off mechanism for severing the web transversely adjacent alternate pairs .of opposed notches and rotary means adapted to grip the length of web substantially-midway of its length so that on continued advance of the web length the same will be folded alonga transverse line to bring the two halves into parallelism.

11. A bag making machine comprising in combination web advancing means, pairs of. notchers at opposite sides of the machine for notching the edges of the web at predetermined intervals to provide two adjacent panels having flanges along their sides, folding means in the path of travel of the web for folding over the side flanges ,of one panel, means preceding said folding means for directing the flanges of one panel through said folding means and for directing the flanges of the succeeding panel outside of said folding means thereby to fold over the flanges of alternate panels.

12. A bag making machine comprising in combination web advancing means, pairs of notchers at opposite sides of the machine for notching the edges of the web at predetermined intervals to provide two adjacent panels having flanges along their sides, zfolding means in the path of travel of the web for folding over the side flanges of one panel, rocking fingers preceding said folding means for directing the flanges of one panel through said folding means and for directing the flanges of the succeeding panel outside of said folding means thereby to fold over the flanges of alternate panels.

13. A bag makingmachine comprising in combination web advancing means, pairs of notchers at opposite sides of the machine'for notching the edges of the web at predetermined intervals to provide two adjacent panels having flanges along their sides, folding means in the path of travel of the web for folding'over the side flanges of one panel, rocking fingers preceding said folding means for directing the flanges of one panel through said folding means and for directing the flanges of the succeeding panel outside of said folding means thereby to fold over the flanges of alternate panels and rotary means adapted to grip the length of web substantially midway of its length so that on continued advance of the web length the same will be folded along a transverse line to bring the two halves into parallelism.

ADOLPH PO'I'DEVIN.