US2062284A - Gumming machine - Google Patents

Description

A. BENNETT Dec. 1, 1936.A

GUMMING MACHINE Filed April. 6, 1935 3 ,Sheets-Sheet l Dec. l, 1936. A. BENNETT 2,062,284

GUMMING MACHINE Filed April 6, V1955 3 Sheets-Sheet 2 Dec. 1, 1936.

A. BENNE'KrZT I 2,062,284

GUMMING MACHINE Filed April` 6, 1935 3 Sheets-'Sheet 5 A Patented Dec. 1, 1936 l UNITED vSTATES PATENT OFFICE 2,062,284 GUMMING MACHINE Arthur Bennett, San Francisco, Calif.

Y Application April 6, 1935, Serial No. 15,005 1o claims.r (c1. 154-1) This invention vrelates to gummed tape and strips and the application of such strips to sheets ofpaper and the like, and the objects of the invention are to provide suitable apparatus to facilitate the application of gummed strips to paper sheets, also for dampening the gummed strips preparatory to their application tov the sheets, and also for-coating the tapes with the gum in applying them to the sheets. Other features .and advantages of the invention will appear in the following description and accompanying drawings.

In the drawings Fig; 1' is an isometric view of my improved gum strip applying table or copending patent application filed under Serial No. 13,037 on date of March 26, l935,`though it is tobe understood that the present apparatus is also useful for applying other or any kind of gummed tape or strips to the margins, or other' 5 portions of printed or unprinted sheets of paper or other material.

In further detail the drawings show a table I supported on a frame 2, providedwith 'a foot- .treadle 3 at the front of the table for "operating 10 certain features of the apparatus tobe described.` Thel table top is adapted to support f a pile orv stack of sheets 4 aligned along one side by a strip or straight edge 5, and at the l5 apparatus. rear by a block 6 adjustably clamped to the 15 Fig. 2 is an enlarged view of the right-hand strip 5, while on top of the stack of sheets, forward corner of the table of Fig. 1 showing which may be printed posters or the like, is a the moistening device, tape back stop and cutheavy weight 'I provided with a'handle 8, and off blade. a forwardly extending rod or finger 9 which 90 Fig. 3 is an'enlarged side 'elevation ofthe cutoverlies 'the upturned forward edges 4' of the off blade operating hook-up'- paper sheets and holds them in the position Fia 4 is an enlarged plan'view of the angular shownfin Figs. 1 and 2. This finger is ad"-` guide bar for reversing the moistened tape. justably"pivoted and clamped to the weight 'IA Fig- 5 iii/2mv elevation 0f Fig. 4; i as at I0 so that it may be set for any size stack' '-Figf 6 is an'enlarged vertical section" `showq of sheets desired and its outer end is curved 25 ing the paper Vstack holdingnger 'and "asso`l downwardly and yprovided with a small -notch ciated parts. as at II orfslightly hooked extremity so that Fig. '7` is 'a still further enlarged-side elevaone sheet 'of the paper at a time maybe easily tionof the papenstak hOldI'lg ngeland quickly released from engagement with the Fig. 8 iS a flfOIlt lvation Qf the 'rghtfhandj finger by the friction of an operators fingers onf 30 forward corner Of the table Wtha gum apply* the forward (or bottom) sheet and whereupon ing fountain in place over thetape. said sheet will fau togbridgea gap I2 in the Fig. 9 is an enlarged elevation partly in Seo" table and rest with its forward margin on the tion showing the construction 'of the nozzle of forward portion or rau l' of the tame and along the gum applying fountain. which thegurnmed tape I3 has previously been 35 Fig. 10 is an end View of Fia'9 Showing the` 1am vso that the sheet will fau upon-it. gum-@Xlldtlg SIO in the 1102218- The tape used may be-some which has pre- Fg. `11 iS a Verticl SeCtOn 0f the tape IIIOS-I viously been coated with gum and rolled up', or tening pad. it may be coated initially with the gum on this 40 Briefly described, lh invention COIIIPISBS apapparatus. If the already prepared tape is used, 40

paratus to facilitate applying SIPS Of glimmed a roll I4 of it is placed over a spindle I5 on a tapealon'g opposite margins-of Sheets 0f papel? shelf 'i6 extending' from the side of the table s'uch as printed sheets, SigIlS, DOSBIS; etc, WhCh' and the' tape is ledfrorn the ioll over a stand! arev later to be stuck to show windows, walls, ing spindle or post II to` hold thev tacky-.side of. etc., for temporary display. The type 0f gllmthe tape I3 outward, thence the tape passes for- 45 med tape for which the apparatus wasparticuwardly along the margin of the table, is twisted larly designed to handle is that which is always at I3 to turn its tackyV side up, thence passed ltacky and( may be transferred bodily from the' downward over idler roll, I8, twisted again, passed tapel on which it is coated to th'ejmargin of a around a tension rol-lerI9, thence upward and printed poster or the like, the 'tape being` twisted again and over a second idler roll- 20, 50 stripped oif when lit is desired to apply the poster again twisted to turn `its tacky side down and to the show window, the ever-tackygum left on. passed over a. moistening pad 2I where it is the poster suificing to .stick thesame to the moistened with any liquid which will act as a window. Sucha tape and the ingredients for solvent for the particular gum on the tape-'such the vspecial gum used is fully described in my as gasolinefor the tacky rubber compound gum 55 disclosed in my copending vapplication before mentioned-and, after moistening, the tape is reversed around an angularly positioned roll or rod 22 to bring its moistened and now more tacky side uppermost and also change its direction of travel 90 so that it may be pulled along the' inner margin of table rail I' adjacent gap I2 and one of the paper sheets 4 released from finger 9 will fall upon its sticky surface, and afterv which the tape is cut off in line with the right-hand edge of the sheet by means of a blade 23 operated by the foot treadle 3.`

Blade 23 is pivoted to a shear block 24 secured to the rail l of the table, and the shank of the blade is linked at 25 to a bell crank 26 pivoted at 21 to the frame of the table and which crank is connected to the treadle as by`a chain 28 providedwith a turnbuckle 29 so that the cutting stroke of the blade may be accurately determined. A stop screw 56 is also provided'to limit the descent of the blade. The treadle is normally raised by a tension spring 30.

The moistening pad v2| may take various forms but is here indicated as a small tray through which the tape passes face down under a guide 53, while unde'r the tape is a felt pad or brush 54, and the tape arranged to touch it as'it goes along to moisten the gummed surface ofthe tape and increase its tackiness, though it may be here stated that the ever-tacky tape of my copending case will work without this moistenlng, but takes a little more timeV` and pressure to get equal adherence to the printed posters or sheets.A

As stated, the lubricant for tape coated with rubber compound gum is gasoline or similar solvent, and it is better to have it mixed with some reproofsolvent such as carbon tetrachloride. The pad tray is kept supplied to a shallow depth with the solvent from an inverted supply can 3| or one fitted with a tight closure on top and open through a feed tube 32 at the bottom which `projects into'the liquidin the tray in the common manner of a poultry drinking fountain.

The raising or lowering of the feed tube to determine the depth is controlled by a set collar 33. When the tape isl cut off by blade 23 it is automatically clamped to prevent its pulling back or curling. This is done by a pivotally mounted block or back stop 34 under which the' tape is pulled and which block-has one or more small spurs or impinging -edge 35 on its lower side which is forced against the tape by the weight of the block swinging on its pivot 36 yet due to the cam-like pivoting of the block it permits the tape to be freely drawn forwardly under the block. Fig. 5 illustrates this action clearly.

Y After dropping one sheet upon a stretch of the moistened tacky tape and cutting it 01T, a fresh sheet is dropped from the stack to this strip of tape to stick to it, and so on until several are thus superimposed and after which they are pushed bodily through the table gap to spring below it as indicated in Fig. 6-so that they can dry more easily, and/or will be out of the way of continued operations. d Anadjustable stop gage 31 is provided on the inner edge of the table rail I' to align the outer end of the tape with the edge of the sheet of paper. As the tackyA tape requires quite a pull to release it from the supply roll I4 and which would impede the speed of operation of applying the tapes to the sheets, the foot `treadle is arranged to unwind a new lengthveach time it pulledalong the rail for another sheet of paper,

the tension or take-up carriage will rise with little or no` resistance to supply the length of tape needed, and is forcibly pulled down again by the foot treadle when operating the cutting oi blade, through means of a chain connection 44. Thus the power of the foot is used each time to unwind a new length of the tacky tape from the roll, and the operator needs usc but slight effort to pull the tape to position along the rail of the table.

Instead of using previously prepared tacky tape, the tape may be coatedon this apparatus and directly applied to the poster sheets by substituting a gum coating fountain for the dampening fountain and using a roll 46 of plain uncoated tape supported on a bracket 41 (which may be shelf I6) attached to the side of the table so that the tape can run straight from it and along the rail I. details of the gumming nozzle in Figs. 9 and 10. In this arrangement the tape 448 runs over a guide pin 51, thence under the back stop 34, and thence under the nozzle 49 of the gum fountain, thence over the shearing block 24 and along the rail as previously described.

In Fig. 8 the cutting off blade 23 is shown as descended and about to cut off the tape.

The gum fountain is a can containing the fluid gum compound of about the consistency of glue best shown in Fig. 10, and at the tape-leaving end of the nozzle the end, wall is relieved a trie as at so as to provide a clearance above thetape, and it is the size of this clearance which determines the thickness of the layer of adhesive gum compound deposited on the tape as it is pulled through and drawn along the rail to receive a sheet 4' of paper from the pile.

With this arrangement the freshly coated tape is applied to the paper sheets and it requires no moistening. Owing to the very small clearance for the gum to flow from the nozzle and thefad= hesive nature of the gum, it will not ow out'ob'- jectionably when the tape is at rest. In operation, as each length of tape is pulled out along the table, or with tacky face up upon thepreviously taped sheet still in place so as'to receive the next sheet, the finger is gently rubbedy along the sheet b'elow lto insure a good contact of the previously applied, tape and sheet, or this may be'done on the return stroke ofthe hand f invmoving back to pull the tape again. If plain tacky tape is used withno moistening it will have to be pressed very rmly into contact with the sheets, eitherhwith the lingers, a roller. or scraper.

This is shown in Fig. 8 with v Any size sheets may be handled on the table by suitable adjustment of its guides and stops 5, and 31. Also tape of any desired material may be used in the apparatus, such as cloth, paper, Cellophane, or any other ilexible material, and the adhesive coating may be of any nature or quality desired, and the-tape may be placed at any desired position on the sheets, either at one or opposite margins, and/or in any other position on the sheets by suitably adjusting the position of the sheets relative to the tape.

Having thus described my improved apparatus and the manner of its use, what I claim is:

1 Apparatus of the character described comprising a supporting surface, means supporting a roll of tape for drawing its free end along and positioning a length of the tape on said surface, and means for supporting and guiding separate cut sheets of paper vto position one at a time respectively with one margin overlying successive lengths of tape so positioned onsaid surface.

2. Apparatus of the character described comprising a supporting surface, means supporting a roll of tape for drawing along and positioning on said surface, means for guiding a sheet of paper to position against said tape on said surface, the last-mentioned means including means holding down a pile of paper sheets, and means arranged to hold one end of the pile arched upwardly so that the sheets may be released in succession to fall to position.

3. Apparatus of the character described comprising asupporting surface, means supporting a roll of tape for drawing along and positioning on said surface, means for guiding a sheet of paper to position against said tape on said surface, the last-mentioned means including means holding down a pile of paper sheets, a ringer arranged to hold one end of the pile arched upwardly so that the sheets may be released in succession to fall to position, and a gap in said surface straddled by. said sheets in falling, said tape being supported on the surface beyond said gap or remote from said pile of paper.

4. In a structure as specified in claim 2, said means holding down a pile of paper sheets being a weight block and said finger being adjustably secured to said weight block.

5. In' a structure as speciedin claim 2, said means holding down a pile of paper sheets? being a Weight block and said nger being adjustably secured to said weight block and provided with a slightly hooked outer end adapted to let go one sheet of paper at a time upon the application of gentle force to the sheets.

6. Apparatus of the character described comprising a work-supporting table adapted to support a pile of-paper sheets to be taped at their margins, means supporting a roll of adhesive tape for pulling along the table to position thereon relative to said sheets, a take-up carriage over-,which the tape from said roll is extended. a back stop device active on said tape to prevent backward movement after a length has been.

pulled from the roll, a manually operated blade for cutting off the tape, and manually operated means for operating said take-up carriage to pull a length -of the tape from said roll.

'7. Apparatus of the character described comprising a work-supporting table adapted to support a pile of paper sheets to be taped at their margins, means supporting a roll of adhesive tape for pulling along the table to position thereon relative to said sheets, a take-up carriage over which the tape from said roll is extended, a back stop device active on said tape to prevent backward movement after a length has been pulled from the roll, a foot treadle operated blade arranged for cutting off lengths of the tapes pulled from said roll, and means connecting said takeup carriage for operation by said treadle for pulling a length of tape from said roll each time the treadle is depressed.

8. In a construction as specied in claim '7, said take-up carriage being of the gravity type and provided with counterbalancing means so that it will move with slight eiort as the tape is pulled.

9. Apparatus for applying gummed tape to the margins of separate paper sheets which. comprises means for supporting a stack of superimposed sheets of paper, a supporting surface along 'which a strip of sticky gummed tape is adapted to be laid sticky side up adjacent said sheets, means for holding the supported sheets bent backward and upward and adapted for releasing of the sheets one at a time tojfall respectively at one margin each upon successive strips of sticky tape superimposed on the margins of the sheets above the tape laid on said supporting surface, and whereby the sheets may be rmly united to the tapes by pressure along the margin overlying the tape.

10. Apparatus for applying gummed tape to the margins of separate paper sheets which comprises means for supporting a stack of superimposed sheets of paper, a supporting surface along whichl a strip of sticky gummed tape is adapted to be laid sticky side up adjacent said sheets and separated from the sheet supporting meansby a gap, means for holding the supported sheets bent backward and upward and adapted for releasing of the sheets one at a time to fall respectively at one margin each upon successive strips of sticky tape laid on said supporting surface, whereby the sheets may be firmly united to the tapes by pressure along the margin overlying the tape, and said gap being arranged and adapted for pushing the taped sheets through as they are iinished.

ARTHUR BENNETT.

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