US1794398A - Slitting device - Google Patents

Description

March '3, 1931: J.`A. cAMERoNUE'r AL l SLITTING DEVICE Filed May 2o, '1929 ATTORVEY Patented Mar. 3, i931 UN'iTED STATI-:sy

PATENT. OFFICE .ramas A. cAMERoN, or BROOKLYN, NEW YORK, AND RoBRR'r Moc. JonNs'roNR, or

SHORT HILLS, NEW' JERSEY, ASSIGNOBS TO CAMERON MACHINE BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

COMPANY, F

sLIT'rING nEvIcE y This invention relates generally to slitting devices and has more particularly reference tota device that employs a circular blade of relatively thin material as a slitting means.

In the accompanying drawings the invention disclosed in several concrete and preferred forms in which Fig. 1 is a general side view, partly in section, of a device employing a relatively thin slitting blade associated, in this instance,

with a baclnng member;

Fig. 2 is a vertical sectional view substantially on the plane of line 2-2 of Fig. l and on an enlarged scale;

F ig. 3 is a view-similar to Fig. 2 but showina modified; form of the invention; ig. l is a fragmentary side view of a modified form of steadying-washer; and

Fig. 5 is a sectional view substantially on the plane of line 5 5 of Fig. 4.

The slitting mechanism consists here of a backing member l having a glass-hard surface with which engages a score-cut member 2. rllie function of members l and as 2 is to slit a web ci dexible material 3 as it passes between them. The score-cutI member is a circular blade as shown and is provided with a somewhat blunt peripheral cutting edge in a'manner well understood so 3@ that the action is that olf cleaving rather than of cutting. lit will also be understood that while the'material here is actually severed or slitted, I do not intend to limit the device to this function as it'may be employed for scoring cardboard instead of foractually cutting and the term slitting as here used is to be understood in that sense.

rlhe web isa traveling web, being pulled by a suitable web-pulling machine such as a winder and the backing roll may or may not be driven. Be th/at as it may it will be 'understood that member 2 will cut 'the material more evenly if it rotates with a surface speed substantially'equal to that of the advancing web, because if there is a tendency on the part of the cutterto hang back it will distort the paper or other material of the web. Likewiseif member 2 wobbles it will not keep in a single trace but will produce.

an undulating or wavy line oflseverance.,

Tiere then weihave ay double problem of so mounting the circular blade 2 as to rotate freely and also to steady it to keep it from wobbling.' A suitable holder composed in part of two side-cheeks 4 that are spaced apart is provided. Said cheeks have straight slots 5 to receive a center support 6 and this latter. is grooved at 7 so that said su port is held stationary in said cheeks. uitable means (not shown) are i employed to clos(` the ends of the open slots, It will be observed that circular blade 2 is of less thickness than the space between-the cheeks and that a circular anti-friction bearing vof greater width than the thickness of the blade but of less width than the distance between the cheeks is interposed between said blade and the center support. Specifically, inner race 8 of a ball bearing is mounted on center support 6, and outer race 9 of said ball bearing is fitted to blade 2 so as to move as one member therewith. 10 indicates two anti-friction steadying-washers or spacing means, one on each side of the blade, interposed between the blade and the cheeks and occupying a space out-- wardly beyond thecircular anti-friction center bearin In this case washers 10 are independent y rotatable and are made of suitable anti-friction material such as bronze. By the foregoing means the blade is kept Vver) steady, being closely confined, and yet is perfectly free to rotate.

In Fig. 3 is showna modified form of the invention 'in which the blade is imbedded in a base, or rather a 'collar 11 is pressed int the circular opening of said blade. This collar has, at one side, a 'shoulder l2 integral therewith and a ring 13 riveted tothe collar as at 14 engages the other side of the blade. The collar is fitted tothe outer race 9. of thc ball bearing so as to move'as one member therewith. Inthis case a plurality of spacing-washers are arranged on each side of the blade. A

ltwill be observed, both in Figsu'2 and 3, that the circular anti-.friction means or center bearing is free of engagement with the cheeks, and that the Washers or spacing means act as centering means not only for the blad(` friction means between the blade and the but also keep the circular anti-friction means out of contact with the cheeks'.

Steadying-washers l0 may be constructed in many different ways. In Figs. 4 and 5` is shown a modification in which instead of making the washers 11l of anti-friction material they are provided with balls 15 that engage the cheeks and the blade. In this case, the washers need not be freely rotatable but may be stationary.

The holder, composed of the two 'side cheeks, may be mounted in any suitable way. For instance, said holder may have trunnions 16 resting in open brackets 17 which latter are carried on a rockable support 18 which byI .its rocking movement brings the slitter into and out of engagement with the backing member. A spring 19 is interposed between the end of the holder and bearing point 2()Y on the bracket. This part of the de-f vice is old and well knownin the art.

. While the invention has been described as being primarily directed to a slitting means, it will be understood that the novel features Signed at the city of New York, inthe borough of Brooklyn, county of Kings, and State of New York, this 16 day of May, 1929.

JAMES A. CAMERON. ROBERT MCC. J OHN STONE.-

described can be employed to mount a member other than a slitting ogLscore-cut blade.

We claim: y 1. The combination with a center support and spaced-'apart side cheeks associated thereblade and the center support, said anti-fric-v tion means being of less width than the dis.

tance between the cheeks, and anti-friction 'spacing means to engage both the blade and the cheeks tosteady said blade and tokeep` thecircular anti-friction means out of engagement with the cheeks.

3..A slitting device including: a -center support, spaced-apart side cheeks associatedv with said support, a circular slitting blade of less thickness than the distance between the cheeksrotatably mounted, between'the cheeks, on said center support, circular anticenter support, and anti-friction steadyingwashers, at least one on each side of the blade,

interposed between the blade and the cheeksand occupyin a space outwardly beyond the circular antiriction means. y l

3. A sliting device including :v a center support, spaced-apart side cheeks associated with said support, a 'circular slittingblade of less thickness than the distance between r the cheeks rotatably mounted, between the cheeks, on said center support, circular anti friction means .between the blade and the center support, and independently rotatable anti-friction steadying-washers, at least one on each side of the blade, interposed between the blade and the cheeks and occupying a space outwardly beyond, the circularantifriction means.

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