US1825044A - Metal spool - Google Patents

Description

Sept. 29,-1931. r.- G. BAXENDEN ET AL 1,825,044

Patented Sept. 29, 1931 UNITED AIENT oF1 Applicationfild ugusfi2} 199, Sefiail 1og382,999, axid in 'dreat Britem August 10, 1928.

This invention relates tometalliospools,

for camera film rolls andthe like,' and partiCularly tothe manufacture of the spmdles therefor. v 6 The object of the invention is tofacfi1tate the production of suit-abl metallic spmdles which Will be of low weight, cheap to menu-fi strong for the pur-* strip of material to be used and a, perfectly facture, and sufiiciently A poses to which theyare to be put.

10 The class of spindle to which the invention relates is that in which aspindle-is orm d* from a fiat substantially rectangular 1-st11p which is bent or rolled upinto a hollow cylifl* der with opposite edges of the strip lying adjacent to one another, the diameter of;the cylinder 'being governed by the original width of the strip. Opposite edges'of the strip are turned in to form aguiding passage -will be appreciated when the film roll is beng wourid onthe spi ndle in a drk froom. A manufacturhig on eachside of the internal longitudinal slot left between the adjacent, Opposite edges.*

The term internal ishere:used toindicate that the slot does not extefid up to eithe1of-n: According to the.

rolled up to form One arrangement 'according to the inventhe ends of the spindle. 7 present invention, theinturned edgesextend *axielly beyond the ends of the internal slOt,:

though not up to the very ehdS of.th Spindle. In a process for making. such: a. ntallic spindle, according to the present invention,

, the four corners of a rectangular' strip are removed, as by punching and opposite longitudinal edges of the strip between the removed corners are bent ofiz about parallel inset limes which do not xtend as far as the removed corners to form, with the main fiat fiat portion of the strip is then bent or rolled up to form a holl0W oylinder with the opposite or bent-0E edges extending into the interior thereof. By arranging for the beIit-. ofiz edges to be bent about parallel limes which are inset slightly from the edges of the fiat portion ofthe strip an 1nternal slot will be left in the spindle between the bent-off edges. The hollow cylinder thus formed is then set L: part of the strip, a. shallow channel; and the lefttfieribetveeh wlienthe spiridle is formed,"

maybe so chosen that the appropriate adja: cent end ofthe bent-off edges can form a bOttom rst forthe cmera key"when it* nters gthe cooperating slot in the appropriate end' 5532 disc of th spindle.

l lle bent-ofi edges act to Strengthen thesp1r1dlegthus allowing 'a verythin metallic rigid spindle (for the use to Which it is in tended tobe subjectd)"to be forrned. A satisfactory spindle ner the weight o weight of a similar-sized spindleforrned of' w0od. The round slot, due {to the material being bent thereat,

provide a 'useful paper or like roll, t

is-that the bent-off ing off of the edges ofthe A guide for the 'end of the he full advantagdoiwhich when the fiat portion of the strip is bent or tion will now be thehollow'cylinder. -7

fully gdescribed with refr e1ence to the accompanying draWings,-the four figuresbf which iridicate four steps the manufacture of'a spindle according tov. 1 Figur 1"-is an illuslfirati0n of the shap o f:

the invention. f

the fiat strip from which th e spindle ismade;

Figure 2 'illusti*atsthe neXt stageofmanufacture in which turnd up Figure 3 illustrates the strip rolled into the edges ofthe strip are width equal'tdthe Figuref4 illstrtes} tlie complted spindle A 'long strip ofsuitble; material, of a lengthlof the spindlehen firiished,is ed into a press adapted to divide the long strip up into a number oftrarsverse stripS such as "that markd 5 in Fig: 1. "At' the sal time-th press punches: out a long i tudiril slot 6 in the centre of each strip5,z and it also removes the material at'the f0ur corners, leaving the blanks 7, 7 and the extending edges 8, 8' therebetween.

'These strips 5 are machine, which 1) then passed into anothi: ends ofi the edges 8,. '8 at right-angles to the main body of the strip forming a shallow channel-shaped member (Fig. 2). Due to the removal of the corners of the strip the bent-ofi' edges do not extend to the endsof the strip, and only the interior portion of thestrip (as regards its length) is a hollowchannel. 7 'Obviouslythe two operations thusofar deseribed may in pratice be efiected in a single automatic machine ihstead of intwo separate machines. 7 The chain limes 9 (Fig. 1) represent the edges proper of the fiat portion of the stfir), but the bent-ofi' edges8,8 are bentsligbtly about the lines 9 but mainly about the chin fines 10, 10 which are inset. slightly with ,re:

spet to tlie'lines 9, 9 and,do not extend. axially as far as the blanks 7,- Z.: When this has v been done the bent-ofi' edges (Fig. 2) are 0 nset slightly, ovei the mainportion of their length, with respect to the edges:o;fthe-flat;

part of the strip marked 11, 11.

In the next opemtion the fiat part ofthe: strip is bent or rolledup, in one or-mo1e- JS&PS,.'tO forma hollow cylihder. thi s operation, the opposite edges 11., 11: are.

brought into contact, but, on release fromthe rolling machine, the natural: resiliency of the material causes the opposite edges of the spihdle to spring'out slightly, as indicated by Fig. 3 where the edges 11,11 are see1i not to.,be in contact. A longitudinal intrnal slot 12 is formedbetween the bent-Ofi edges 8 85 v In the final the opposite edgesll,- 11 into. contact, and the slot.12 between thebent- lofi edges 8, 8 is then truiy an internalslot, whieh does not extend-up to the ends of thQ-spindle.

The enddiscs (not shown) of the spoolmay besecured at the ends of the 'spindleby a pressing operatioh or by Welding. :The pres-' ont invention is not eoncerned with'the man ner in which the end spindle;

It should bei10ted th2ittlie bent ofi edge's 8,

. be wound upon the spindl&wil1be first inserted-into slot 12,: and that the slightlrouhdedextemaledges ofthis slot aet,a's a leader;

guide for theend ofthe rolLinto this"slot and=intoslot 6;

Furthei*more, ,it will 'be seen -from Figs. 2 and 3 that the lengthof the bent-ofi' edgeS 8,

8 is g'reater than the length of the internal slot 12. By suitably detemining theamoMfi-of operation the spindle is set, the ends 13 being pressdoutwardly as indicated in Figa 4; 7 This serves to'draw up.

dises jare, fiXed on the It will be evident that andthat the pa1allel sides of the slot.aet td 1 gu1de the end of the roll through the spindle *the" adjacent edges of the strip inturned to fonm an internal longitudinal slot, eharacteri'zed'intbat the inturned edges extend axially -beyond the slot, but not up to theends of the spihdle.

2. A metallicspool spindle for photographie film sp0ols comprising a tube.formed of sheet metal rolled 11p0n itself to provide a split tube, the longitudinal edges of said sheet metalbeifig cut-away at the corners thereof,

and th'eportionsof said longitudinal edges intermediate of said cut-away portions being insetin parallel lines to form widened side walls of a normally open paper strip receiving:slot, said she6t' metal being also formed with a slot substantiallparallel to the first slotlocatedin an opposite side of said split.

tube; v r v r 3. A spindle:fotphotographie film sp0ols eomprising a-blahk of sheet metal rolled upon itelft provide a 'splittube, the longitudinal edgs of saidxblank being cut-away at their corners and fofmed with inWardly projecting reenf0rcig flangszspaced apart to provide a normally oPened strip receiving slot, the, cutawy-corner portions of said split tube outw'ardl (if: said -flmiges forming abutting edgs ,to prvent: the closing of said slot, the ends:of said tublar spindle bein'g eonnectible t0 spool dises.-

' THOMAS GEORGE BAXENDEN.

. JOHN ROBERT COLLYEAR.

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