US1714585A

US1714585A - Bag machine

Info

Publication number: US1714585A
Application number: US683818A
Authority: US
Inventors: Beckmann August
Original assignee: Thomas M Royal & Co
Current assignee: Thomas M Royal & Co
Priority date: 1923-12-31
Filing date: 1923-12-31
Publication date: 1929-05-28
Anticipated expiration: 1946-05-28

Description

y 1929- A; BECKMANN BAG MACHINE I Filed Dec Patented May 28 1929. I

UNITED sra'res' 1,714,585 PATENT OFFICE.

nueusr BEGK AN'N, or 3mm mwn, PENNSYLVANIA, ASSIGNOR 'ro' 'rnonms u. ROYAL & 00., or PHILADELPHIA, PENNSYLVANIA, nconroiwrron or PENN-i sYLvA A.

BAG mcnmn Application filed December 31, 1828. Serial No. 683,818.

My invention relates to machines of the type in which bellows-folded tubes are formed from a web of paper,- which tubes are subsequently severed into bag blanks and then presented to bottom formin mechanism, all of such operations being performed automatically upon a continuous web (or webs) of paper fedto the machine from a suitable sup- One ob ect of my invention 15 to provide bag machines of this character with means whereby the paste can be uniformly applied to the edge of the web subsequently formed into the bellows-folded tube; In order to effect this result, I preferablygear the paste roll to one of the idler rolls over which the web of paper passes; the movement of which idler roll is eflected by the movement of the Web, and by gearing said paste roll to an idler rollthat is driven by the paper so that said paste roll is positively moved, there is an assurance that a line of paste will be applied to the moving web of paper in the proper manner.

A further object of'my invention is to provide means for spreading the line of paste so applied into a thinner film, so as to insure a smooth seam which may be closed by the:

' application of plain surfaced rolls which may.

also serve as the draft rolls for efi'ecting movement of the bellows-folded tube.

A further object of my invention is to prois to provide a special draft roll for eifecting movement of the bellows-folded tube to the point where the latter is severed into blanks which are then passed to bottom forming mechanism to complete the formation of the ba These and other features of my invention are more fully described hereinafter; referencebein ings, in w 'ch:

Figure 1, is a plan view, more or less diagrammatic, of suiiicient of the mechanism of a paper bag machine to show the paste-applying means and the adjacent elements for forming a bellows-folded tube from a continuous web of paper, to illustrate my invention.

Fig. 2, is a side elevation, more or less diahad to the accompanying drawgrammatic, of the mechanism shown in Fi 1. p Fig. 3, is a view in, elevation of the drawrolls which I may employ with my improved I bag machine. 4 Fig. 4, is a plan view of a portion of the web, showing the lines of fold and indicating by dotted lines the portion-employed to form a single bag blank',and

Flg. 5, is a perspective view. of the end of a bellows-folded bag blank which is subsequently formed into the bottom of the bag.

Referring to the drawings, 1 indicates a portion of the frame-of the machine, which may support a roll of paper 2, (and in some instances a'second roll, indicated by dotted lines at 2). A paste receptacle is indicated at 3, and guide rollers 4, 5 and 6 may be mounted adjacent thepaste receptacle for the proper direction of the paper. 7 The machine is ofthe type employing the usual

former plates

9 and 10, supported by the frame in any suitable number, with guide fingers 11 located near the receiving end of the former plates; such guide fingers serving to produce the desired bellows-fold at the edges of the tube being formed, and from which the bag blanks are subsequently out. w

- These parts are substantially similar to parts of bag. formingmechanism already in use and in the operation of my improved machine,-the'web of paper is conductedto the former plates in such a way that the seam to be formed is not disposed at the middle of the upper former plate, but is arranged along one side thereof, preferably at that side of the paperroll opposite the point at which the paste is applie i In order that the web may be secured together to form a tube,one edge of the same has a line (or lines) of paste applied to the same and for this purpose I may provide a grooved paste roll 14, disposed within the paste receptacle 3; said roll being carried by a shaft 15, suitably journalcd in said paste receptacle or otherwise supported. The paste-applying roll is preferably adjustably mounted on said shaft 15, and is arranged to-engage one edge of the web of paper as it passes over the guide roll 6, as clearly illus-..

trated in Fig. 1.

In order that paste can be applied uniform 1y to the surface of the web of paper passing over said roll 6, avoiding any possibility of the paste roll halting or not moving with said guide roll, I provide the shaft of the latter with a pinion 16, and the shaft 15 carrying the paste rol1'14 isprovided with a meshing spur wheel 17, secured to the outer end of the paste roll shaft so that movement of said guide roll -6 induced by the passage of the web of paper over the same, will effect positive movement of the shaft 15 carrying the paste roll and uniform contact of the same with the web of paper will be assured. The pinion 15 is preferably a broad-faced member so as to permit a range of adjustment for the to and above the former plates for the purpose of making these slits. As only one face of the tube isslit, only one set of knives are employed.

'1 The bellows-folded tube is carried forward on the former-plates andpassed to'the well known severing and bottom forming mechanism (not shown) by upper draft rolls 20 V For this purpose I may provide a spreading,

finger comprising a fiat plate, substantially and 21, whichcooperate with a lower roll 22, and the shafts 20*"- and 22 carrying these rolls maybe geared together. I

In order that the several draftgrolls may apply their pressure evenly to the seam and avoid uneven draft due to any unevenness in the line (orlines). of the paste, I provide -means for spreading the line (orlinesi); of

paste applied to the web by the paste roll.

flexible, indicated at 25, such plate havingla y support 26 carried by a stem 27, Suite mounted upon the frame 1. This stem may carrya torsion'spring 28, one end of which is attached-to a fixed part ofthe mountwhile the o posite end is connected with the sprea er element so thatthe operativeend" of the latter may be lightly held in contact r with the web over the line (or lines) of paste ap lied thereto.

l e action of this spreader to produce a relatively thin film of the paste applied and when such portion of the web reaches the 3 ,draft rolls, 20 and 22, they will ress it down upon the edgeofthe paper w which has been brought into the propergelativc 'jtionby the former plates. The lower'mft 60,

roll is 'groov f at 2'2 andthe upper-101120 engaging the seam partially I overlies this groove so that should any portion of the paste tend to increase the thickness'of the seam it may be relieve d, spreadinglaterallyinto such groove.

In the, operation of my improved machine, the web of paper after being formed into a bellows-folded tube, in which a side seam is employed to complete the tubular formation,

receives slits on one side only, indicated at A, and when such bag is introduced to the bottom forming mechanism, the portion a, lying between said slits A, is properly manipulated and is the last secured in place to form the bottom of the bag by the applicaa web of paper, usually of a glazed character and much thinner, to form a lining; the two webspassing to the tube-forming mechanism as a unit and the operation upon such duplex web resulting'in the formation of what are known as lined bags. For this purpose, therefore, I have illustrated the paste receptacle as provided with a pair of paste-applying rolls, and it will be understood that the roll indicated at 14 may be employed to apply a line of paste to the Web of paper forming the outer portion of the ba while the roll indicated at 14 may be emp oyed to apply a line of paste to the web of paper employed for the lining. The paste for the outer web or layer of paper is preferably applied by a grooved roll as indicated at 14, making two fine lines of pasteupon the paper, and in the present instance it is these lines that are engaged by the spreader to provide the wider and thinner film of paste whereby the side seam may he formed which is the part engaged by the

draft rolls

20 and 22. It will be sunderstood, of course, that the spreader may be employed with each line of paste applied.

It will be understood, of course, that the slits A may be formed in either face of the bellows-folded blank adjacent to the point where such blank is severed from the tube, and that slitting knives, such as those indicated at 19, for instance, may be arranged to operate from a point below the former plate 10 instead of above the same.

I claim:

1. The combination with a pastereceptacle, a guide-roll disposed adjacent thereto and means for conducting a web of paper over said guide roll, of rotating paste-applying means mounted in said paste receptacle and adjacent'toone edge of the web of paper and arrangedto cdntact therewith for the-purpose of applying--a narrow line of paste to the outer surface thereof, means for dr ving said paste-applying means and the guide roll whereb the movement of one of said members be positively transmitted to the ptheriand the paper web moved in unison with the paste-applying means, and an overhanging member atone end of the guide-roll and'under slight tension posiinto a slightly wider film.

2. The combinationwith a paste receptacle, 7

a guide. roll disposed adjacent thereto and means for conducting a web of paper over said guide roll, of a roll mounted in said-paste receptacle and arranged tocontactwith said web of paper; said roll having a contacting surface adapted to applypar'alleling lines'of paste to the outer surface of said web of paper, means for driving the paste-applying roll and. the paper in unison, and means d1s-.

posed at one end of the guide-roll and overhanging the paperweb and in contact therewith for spreading into a continuous connected fil-m on the web of paperthe lines of paste applied thereto by the roll in the paste receptacle;

The combination of a paste receptacle, a pair of narrow paste rolls disposed in said receptacle side by side; one of said rolls being arranged to apply two lines'of paste .to theouter surface of a web of paper 'means including a guide roll for conducting said web of paper past the paste-applying rolls, and a spring-pressed finger positioned above and adjacent one end of the guide roll and adapted to-contact with the surface of the paper web for spreading into acontinuous-connected film the parallel lines of paste applied by one of said paste rolls.

Inwitne ss whereof I have signed this specification. v AUGUST BEGKMANN.