US1081583A - Machine for preparing stay-strips. - Google Patents

Description

G. H. CROWELL.

MACHINE FOR PREPARING STAY STRIPS.

APPLICATION FILED PERA, 1913,

Patented Dec'. 16, 1913.

2 SHEETS-SHEET l.

H IIIIIHH' HHIIIIII C. H. GROWELL.

-MAGHINE FOR PREPARING STAY STRIPS.

APPLIGATION FILED PERA, 1913.

Patented Dec. 16, 1.913.

2 SHEETS-SHEET 2.

Umm' a. UWE-LI', 0F 'SWAMPSGOTI MASSACH'USETTS.

een ennemies-sommaire specification-ot Letterslatent. .application maremma; ma. A:serial no. masa atented Dec. .16, "1913.

,To :ail whomc't may concern:

iBe known :that I, lC1L.mn1:. nzis 1H.' Gnownm.,

a lcitizen :of the United States, residing at ,Swampscota county of Essex, `State of.I

Massachusetts, have invented a certain -new and useful Improvement in Machines for' :Preparing Stay-Strips, -of which the follow- 'King is a specification, reference .-bemg had therein to the accompanying drawings.

My invention relates to machines. for forming a fold longitudinally 'of a :coil of `madhine.

The machine forming fthe subject matter@ xof my invention is particularly intended tof `:produce a stay strip of the Anovel form.

shown and described invan application for; `Letters vPatent ofthe United States ufiledjby:4 une .January 27, 19.13, Serial No. 744,308.

The peculiar feature :of the said stay strip is that awhile lit is bent or folded along the `.median line it is not scored or indented, and `is not weakened, -at the bending line, butretains its initial strength while .the same time' it will feed true in -a corner staylng machine and all resiliency having been re-I moved :along 'said Aline of lfo'ld,it 'will :lie fiat on the sides of the box to vwhich is applied. 'The machine lembodying the present invention produces this novel stay strip at a .minimum of expense l:so that the stay strip costs no more than marked Aor indented stay strip.

Accordingly my present invention has for its object 'a machine which 'will 'take a rol-l 'of dat stay strip (either gummed or ungummed) unwind the stay strip from the roll, form a fold in it as described, press the strip along the line 'of fold, iiatten 1t out again and rewind it, performing all the operations simultaneously and as rapidly as it is possible to unwind and rewind the paper. In the machineembodying my invention the stay strip` is unwound from a coil, it then passes' over or between' a suitable folding die or dies which operate to fold. the stay strip upon itself along the medianline. The stay strip then passes between a pair of Aferent widths of stay strip.

pressing 4rolls which operate to press the stay strip 'es cially .at the `-fold, breaking downfany sti ess ofz'the materialAalong-'said lfme'and .removing its resiliency. Thereafter the stay stri-p passes over fa vsuitable guide roll which opens and fattens the 4folded strip so that it may be re-wound in its flattened condition ready s'for use in a corner staying machine.

The invention will `.be 'fully understood from :the following description taken in con- -neotion with the accompanying drawings,

the novel features thereofbeing pointed out and cleanlydeined in the claims at the close of the specification. v

l.In the drawings, Figure 1 is a side 'elevation of the machine embodying my invention. Fig. 2 is a section of the same taken :on line 2 2 of Fig. 1 :look-ing in the ldirec- -tion of the arrows. rFig. 3 is a Itop plan view ofthe mao'hine shown in Fig. 1. .Fig 4 is an enlarged 'section on 1line 4-4 Fig. l1., of one of the folding dies. Fig. 5 an enlarged section -on :line 5--5 Fig. 1 of vthe folding dies, this section being taken at a v,point near the :end where the stay strip .emerges from the fold-ing dies. Fig. 6 is fa plan View showing fa modification hereinafter described.

.Referring `now to the drawings, there :is

shown at A a suitable frame for the Imachine. Above this frame and adjustably supported thereon l`is Va table B, upon which the rolls of paper are supported. The table B is adjustable vertically by means of screws 1.1, 11, operated by the hand wheel 12 to adjust the machine for operation upon dif- At `C is shown the roll of stay strip which is being unwound, 'and at D the roll which ,is being rewound, the stay strip between the two rolls being indicated by the letter E. As is well known yto those familiar with lthis art the stay strip is woundon a center of wood, such as is indicated at F and G. The roll-C., which is being unwound, is -placed on a spindle 13, and a ca 14 secured by a set screw l5 is pressed own on the wooden center F causing the small projections 16 on the under side of the cap 14 to engage the wooden center F. It will thus be seen that the shaft 13 will be caused torotate when :the stay strip E is pulled off the roll C.

In order that the stay strip E may have als `the proper tension a friction device or brake is plated on the shaft 13. This consists of a small brake wheel 17 secured to the shaft 13 and having its surface in frictional contact with a brake shoe 50 mounted on a flat .spring 51 secured by a screw or simllar device as at to a downward projection 61 from the table B. The spring. 51 applies suflicient friction to the brake wheel so that the shaft 13 canno-tspin and so that a sultable resistance will be offered to the unwinding of the stay strip from the roll.

The stay strip is unwound from the roll C by being wound onto the roll D. The roll Dis mounted on a shaft 20 at the other end of the machine and is caused to rotate with said shaft by a cap 21 similar to the correspondingparts of the unwinding lshaft 13. The re-winding shaft 20 is driven by a belt and pulley or equivalent device. As shown bevel gears 23 and 24. The belt passes over` the main driving pulley 27 and is driven by it. The belt 25 is preferably tightened by a tightening pulley 28 adjustable on a screw threaded rod 29, which is conveniently 0perated by a hand wheel 30.

After leaving the unwinding roll C the stay strip E passesv around an idler 33 and thenA passes through a gradually converging folding die 34, the two sides of which'are substantially equal in width to one-half of the width of the stay strip. As the stay strip passes through the converging die it is gradually bent into a V-shape and then as it proceeds is folded upon itself so that its halves are substantially parallel with each other. As will be seen from Fig. 5 the end of the passage in the folding die at which the stay strip emerges is substantially parallel sided and slightly more than twice the thickness of the stay strip to befolded so that the strip may readily pass through it. To keep the stay strip inposition in the die 34 I provide a hinged member 601 which contacts with the edge of the stay strip and holds it in the groove in the die.

When the stay strip emerges from the die, folded upon itself along its median line, it passes between a pair of pressing rolls 37 and 38 which iron or compress the strip especially along the line of fold, fracturing and breaking up, any sizing, adhesive or other stiff material along said line, and removing all resiliencytherefrom. The fibers of the cloth or paper of which the strip is formed are not however torn or broken by `the folding or pressing operations so that the strength of the strip is not impaired. After pressing thestrip is unfolded and flattened out and rewound in a coil ready for use. By this device a stay strip is produced the two halves of which have a limp hinged connection with the resiliency destroyed at the drawings, a belt and pulley 25 and 26 drives the re-winding shaft 20 through the `bite of the the Ifolding line and when therefore the strip is laid on abox corner it has no tendency to lift `ofl' before the adhesive sets as would be the case if the resiliency at the line of fold was not destroyed.

In order to provide for adjustment of the top roll 37 I rovide square slidablel boxes 80 underf w ich shims 81- may be placed. The boxes 80 are held down on the shims'by a spiral spring. After leaving the pressure rolls 37 and 38 the folded stay strip 1s opened so that it lies Hat and is guided over the idler 39 to the re-winding mechanism. As the stay strip is subjected to some tension when it passes over the idler'39, it is substantially flattened out so that it may be rewound without difficulty.

The pressure rolls 37 and 38 are driven I.

at a surface speed equal to the linear speed of the stay strip by means of a pair of gears 40 and 41 on the main shaft 42 and the` top roll 37 is driven from the bottom roll 38 by means of two gears 43 and 44, see Fig. 2. As it is desirable that the machine should be capable of folding stay strips of various widths I make provision for its adjustment.

for this purpose by raising or lowering the table B.v When'it-is desired to fold a wider stay strip .the table is lowered a distance equal to one-half'the increased width of the stay strip,l and adie for a strip of the desired width is inserted. The position of the changed.

The driving pulley to which power is ap- 'plied from a convenient source is shown at 65, Fig. 2, mounted on the main driving shaft, and a clutch and shipper device operated lby the Vfoot treadle 66, and of well known construction as will be clear from said Fig. 2 is provided for the stopping and starting of the machine.

At Fig. 6 I have shown a modification of i my machine in which two folding dies and two sets of pressing rolls are employed. After passing through the die shown at 70 and the pressing rolls 71 it is unfolded and passes the idler roll 72 then through another die 73 which folds it upon itself, but in the reverse direction from the first fold, then between another set of pressing rolls 74,

pressurer0lls'37 and 38 is notA then past an idler 75 where it is flattened Y out preparatory to being rewound into a coil ready for use. The object of this double folding in reverse directions and double pressing is to provide for stay strip which may be made from very stiff or heavy or intractable material and which may require a double folding to remove all resiliencyv at the line of fold. A number of foldings and pressings may be employed without injury to any stay strip but usually one folding and pressmg will be suilicient to produce a stay strip which' will feed evenly in a corner stay machlne and which will not have resiliency leef4 in combination with a spindle to receive a enough left in the line of fold to cause it to lift off the box corner when moistened and pressed against the latter.

What I claim is:

1. In -a machine of the character described,

roll of stay strip, a folding die, pressing rolls, rewinding mechanism, and means for adjusting said folding die and rewinding mechanism with relation to said pressing rolls for various widths of stay strip.

2. In a machine of the character described, the combination with a table having thereon a spindle to receive a roll of stay stri a foldin die and rewinding mechamsm o; in-

depen ently supported pressing rolls, and

means for adjusting said table with relation to said pressing rolls for diferent widths of stay strlp.

3. In a machine of the character described, the combination with a vertically adjustable table carrying a spindle for a roll of stay st rlp, guide rolls and a rewindin mechamsm for said stay strip, of a die aving a passage therethrough with gradually converging sides and pressing rolls adjacent the mouth of said die, said die and said rolls bein mounted on the frame of the machine inbzpendently of the vertically adjustable ta e.

n In testimony whereof I aiix my signature, 1n presence of two witnesses.

CHARLES H. CROWELL.

Witnesses:

WILLIAM A. MACLEOD, Amor: H. MORRISON.

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