US1032366A - Machine for making paper and like bags. - Google Patents

Description

J GRAHAM.

MACHINE FOR MAKING PAPER AND LIKE BAGS.

APPLICATION TILED IBB.3, 1912.

' 1,032,366, Patented July 9, 1912.

3 SEEETBSHEET 1.

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J. GRAHAM. MACHINE FOR MAKING PAPER AND LIKE BAGS.

APPLICATION rum) FEB. a, 1912. 1,032,366. Patented July 9,1912.

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Wine sses. Inventor.

J. GRAHAM.

MACHINE FOB-MAKING PAPER AND LIKE BAGS.

APPLICATION rum) 11:13.3, 1912 1,032,366. Patented July 9, 1912.

3 SHEETS-SHEET 3.

Wigsses. Inventor.

' ous strip or web of .paper or-l I I rollers.

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' ing Paper and ing devices for forming the web int-o a con- TED STATES PATENT OFFICE. "JAMES GRAII-IAM, or EAST LONDON, ENGLAND.

MA CHINE roa- Maxine APER AND LIKE BAGS.

Specification of'Letters'Patent. Patented Ju1y9 1912, Application filedFebruary 3, 1912. SerialNo. 675,331.

To all whom it may concern Be it known that I, JAMES GRAHAM, a subject of His Majesty the King of Great Britain and Ireland, residing at East Ham, London, England, have invented new and useful Improvements in Machines for Mak-' Like Bags, of which the'fol: lowlng is a specification.

This invention relates to machines for making paper and'like bags from a continuike material, such machines usually comprising, feed roll ,ers for drawing the web, folding and pastpasting and folding web, to the usualbot-tom however, each bag the bag removed in the usual manner. The ay be regulated ac.-'

position of the stop m cording to the amount of fold required on the. bottom of the bag, andthe action of the to the travel of the pasting device timed drawing rollers in any suitable manner.

stood it will now be described by reference to the accompanying drawings in which:

Figures 1' and 2 show as an example portions of a web of paper or the like perforated into bag lengthsand adapted tobe formed respectively into a 'side seam bag and a center seam bag, by means of a machine constructed according to the invention; Fig. 3 is a side elevation and Fig. 4 is a plan view of a portion of a paper bag making machineconstructed accordingto one form of my invention the usual folding devices being omitted.

As shown in Figs. 1 and 2 the web of paper or the like is divided into bag lengths by lines of perforations such as 1. The web passes through the machine in the direction of the arrows, the upper portion 2 in each case beingadapted to form the bottom of a bag, the portions 3 being the tops of the previous bags.

Referringfirst to Fig. 1, in order to form a side seam bag the lines of perforations 1 are provided with two bends or zig-zags a, b the bend a being near the edge or side fold of the web represented by the dotted line 4, while the bend b is at a point nearer the center fold, represented by the dotted line 5. In the operation of the machine the web is tlnuous fiat seamed tube, a cutter or breaker for severing the length of tube required to form a bag and a bottom forming device which turns up and pastes down the bottom or end of the bag.

An object of my invention is to provide an improved means for manufacturing paper bags from acontinuous flat papertube divided into bag lengths by lines of' perforations extending in different transverse planes across the respective walls of such flat tube and meeting at the side edges of thelatter, thereby producing a strong and inexpensive paper bag having a pasting stripextending across its bottom. Such a machine used in the manner hereinafter fully described, enables a bag of constant length and uniform'bottom fold or turn up, to be made.

According to this invention, instead of having the usual breaker or cutter themachi ne is provided with a pair of breaking These breaking rollers run at a feed rollers of the a uniform circum-, entire surface, so in, snatch or pull greater speed than the machine and may be of ference throughout their as to exert a regular stra To enable the invention to be fully underon the paper passing between them, or said folded over from right to left along the line breaking rollers may be of a greater cir- 5 and from left to right along the line 4, cumference at one end than at the other so paste being applied between the folded edges so that a flat tube h as to exert a greater strain, snatch or pull hand side is formed,

at one side of the paper, and so help in the breaking of same. The speed of these breaking rollers is such as to cause a drag'or pull which may be in a line with or at an angle to the paper suflicient to tear oif a bag length at the perforations in the flat tube as the folded web is fed forward. Each severed bag length is then carried between or upon fast moving tapes orthe equivalent which run at a greater speed than the feed of the v1 seam will be formed, and as before, when or both, as desired.

7 running at a-greater rate than the feed rollof perforations. The severed bag length is 4 15. The stop 15 is adjusted to arrest the feed it forward on to the usual moving belt tension arms 19, pivoted to the machine 2 v-1,032,see

frame. Any suitable [gearing may be employed for driving the rolls 13 and tapes 1 1, the arrangement shown giving good results.

If desired, to assist in the breaking of the paper a member having preferably a rounded surface can be caused by suitable means to come into contact with the paper from above or below same, at a point between the feed rollers 12 and the breaking rolls 13, said member being adapted to put a strain on the, paper and so assistin breaking it. This member may be timed to come into operation at regular intervals, for example, it may be operated at a speed equal to that 0f the'dipper 17.

By carrying the severed bag lengths to the bottom folding devices upon tapes or the like moving at a speed greater than that of the feed of the web and by arrestlng the projecting portion 6 will catchthe paste and thus effective closing of the bag will be insured.

In Fig. 2, the line of perforations 1 is provided with two bends or zig-zags a, d, placed at points nearer the center of. the web than in the previous case, so that when the edges are folded toward each other along the dotted lines 8, 9, a flat tube having a center the portion 3 has been detached a 'proj ecting portion 10 will be left at the bottom of the tube to receive the paste-and so insure effective closing of'the-bottom. In this case the 15 width of the bag'is represented by the distance betweenthe dotted lines 8, 9, and it will be 'obvious that the width of the bag and the positions of the bends may be varied as described according to the size of 2 thebag and overlap of seam required. v

The web is preferably printed on its underside, so that when folded in the machine the printed matter willbe upon the outside of the bag, upon the back or front of same,

the bottom over, the whole operation is made independent of the feed, and bags of constant length and constant length of fold at the bottom are produced. It follows that arise in printing and perforating the web,- any printed matter upon the bags forme in a machine constructed according to this invention will be in the same relative position upon each bag. The printing and perforating may be se arate operations, or they may advantageousy be carried out on; a combined printing and perforating machine Referring to Figs. 3 and 1 the web of paper perforated as above described, and also printed if desired, is placed in a roll (not shown) at the'right hand end of the 30 machine, and is drawn through the usual folding devices (not shown), and between tension rollers 11 by means of feed rollers 12. Instead of the usual breaker orcutter a pair ofbreaking rollers 13 are-provided,

perforating would be practically simu taneous the relative positions of the printed matter on"each bag would'be practically idenv 'tical.

It is to be understood that the invention is not limited to a machine for the manufac-v ture of center and side seam bags of the kind I described only, but may obviously be applied to machines for the manufacture of' other kinds'of bags, such as sugar bags with ers 12, said rollers 13 being adapted to grip the web,'now folded into the form of a fiat, tube, and to impart a drag or pull thereto suflicient to tear off a bag length at the line then carried by fast running tapes 14, driven preferably as shown, at a greater speed than the speed imparted to the web by the feed rollers 12, until it meets an adjustable stop bag length incorrect position over the rollers 16 which cooperate with the dipper 17 to turn in and close the bottom of the bag. The dipper17 supplied-with paste by the 50 pasting roller 18, operates in the usual manner, descending on the stationary bag length and simultaneously pasting and turning up the bottom thereof and forcing the bag be tween the rollers 16 which latter press it and bags, tea bags, and the like.

What I claim is-:'

In a machine for the manufacture of paper. bags from a continuous fiat paper tube divided into bag lengths by lines of perforations extending different "trans-' verse lanes across the respective-walls 0 such at tube and meeting at the side edges of the latter, the combination of feeding rolls for pressing the walls of such flat tube in contact across the side edges .thereof, and breaking rolls for tightly maintaining such contact of the walls and drawing the paper tube from said feeding rolls with a suflicient tension to cause initial separation of the 12 walls at the meeting point of, such perforated lines.

2. In 'a machine for the manufacture of paper bags from a continuous flat paper or other conveyer for the finished bags. By adjusting'the stop 15, the length of the bottom fold of the bag may be regulated and set to any desired measurement and it will 60 be obvious that by thus positively arresting each bag at the same point, uniformity in the depth ofthe bottom fold of a series of, bags can be obtained. Tension may be applied to the tapes 14 by means of weighted bag at a definite point previous to folding 85 I save for such slight inaccuracies as may 90 7 square oroblong shaped bottoms, money n tube divided into bag lengths by lines of 1,032,366 i i :1 t

perforations extending in different transverse planes across the respective Walls of such flat tube and meeting at the side edges of the latter, the combination of feeding rolls for pressing the Walls of such flat tube in, contact across the side edges thereof, tensioning rolls for deliveringthe flat tube under uniform tension to said feeding rolls,

and breaking rolls for tightly maintaining suchcon'tact of the walls and drawing the paper tube from said feeding rolls With a sufficient tension to cause initial separation of the Walls at the meeting point of such perforated lines.

In Witness whereof I have hereunto set my .1 5 hand in the presence of two subscribing witnesses.

JAMES GRAHAM.

Witnesses RICHARD GRAHAM,

W.AS

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