US1649635A - Perforating device - Google Patents

Description

New. 15, 1927. 1,649,635

L. J. WILLARD PERFORATING DEVICE Filed Auz. 28, 1925 FIG-.42

Patented Nov. 15, 1927.

UNITED STATES PATENT orsrcrz.

LOUIS J. WILLARID, 0F NORWALK, OHIO, ASSIGN'OR- TO THE ROTARY PRINTING COM- ?ANY, OF NORWALK, OHIO, A GORPQRA'I'ION OF OHTQ.

PERFORATING DEVICE.

Application filed August 28, 1925. Serial No. 52,994.

This invention relates to sheet perforating mechanism particularly adapted to paper sheets, and the primary object is to provide a mechanism adapted to operate on a moving sheet or strip of paper for example as fed from a web printing ress, and effectively perforate such sheet.

Another object is to provide a simple effective perforating apparatus which may be mounted in a convenient manner in a pair of rolls capable of feeding the sheet and place the perforations in predetermined .positions on the sheet.

A further specific object is to provide a simple device for arranging a plurality of perforating devices in a pair ofcoacting rolls in such a manner that their relative position on the respective rolls may be easily changed.

I have discovered that I can accomplish the desired result by mountingin a pair of coasting rolls capable of feeding paper sheets, a pair of elements comprising simply a hollow die carried by one of thejrolls and a spherical die member resiliently carried by the other roll and adapted to register with the hollow die. I find that the same spherical member may be used with hollow dies of various sizes. j

Further features of the invention will appear in the following; description which relates to the accompanying drawing. The essential novel characteristics will be summarized in the claims.

In the drawings, Fig. 1 is a perspective view of a pair of coactinz rolls in which my invention is embodied; Fig. 2 is a cross section through a single perforating unit; Fig. 3 is a perspective view of a preferred form of female die; Fig. 4 is a perspective view of a sheet as perforated by the arrangement shown in Fig. 1.

In the embodiment shown, the mechanism is arranged to perforate sheets or a web of fed paper with a series of aligned holes. such as commonly used for loose-leaf binder sheets.

Referring in detail to the drawings and indicating the various parts by suitable charactcrs, the male die elements, including the respective holders therefor, are indicated generally at 1 and the female die elements a152, each set being suitably mounted in respective rolls R and B. Each maledie element as shown in Fig. 2 comprises aspherical punch or perforator, preferably a metal ball 3 which may be mounted in a cylindri- 6 bearing against a washer 7 having a, congail le lower surface adapted to engage the a a 1 Suitable means for adjusting the action of the spring may comprise a threaded plug 8 bearing downwardly upon. the upper end ofthe spring; as shown and threaded into the shell. The shell as shown is threaded externally throughout the greater part of its length as at 10 into a block ll which block may be made with a dove-tail shank adapted to enter T-slots 18 which I have shown conveniently arranged in the body of each of the rolls. Any suitable means may be pro vided for holding the shell in adjusted position so that the ball is maintained in proper,

relation to the peripheral surface of its roll, such for instance, as a set-screw 15in the body of the block 11. p i

The female dies comprise essentially members such as indicated. at 20 each having a circular cutting edge as shown at 21.. Each die 20 as shown has a central longitudinal flaring opening; 22 which widens "toward the axis of the roll upon which it is mounted in order to provide for the easy discharge of scrap paper therethrouggh into the interior of the roll.

The female die may be held in a manner similar to that of the shell 4. namely by means of being threaded as at 24 into a block 25 where it may be held hv a set-screw 15. Any suitable means may be provided effecting longitudinal adjustment of both the shell eland die 20, such for instance. as screwdriver slots 26 and 27 in the shell and die respectively.

The block 11 and 25 may be slidably mounted in T-slots as shown in Fig. 1 and metal inserts such as indicated at 28 may serve to position the blocks. longer or short" er inserts being; employed where it is desired to vary the distance between the perforations inthe paper. Suitable means may be provided to prevent the blocks and inserts from shifting lengthwise of the rolls. I have shown, for instance, a split block 30 mounted in the groove. and expandable by means of a screw 31 passing into a tapered thread in theblock.

I have found that when such an arrangement is mounted as just described, in suitable rolls, that a single set of balls may be employed with a number of female dies each of which has a cutting edge of different diameter, it being simply necessary to adjust the ball or die up or down as required in such amanner that the ball seats firmly against the edges of the die when paper is fed therebetween.

It will be seen that when a web or sheet of paper such as indicated at S is being fed,

as from a printing press, into the bite of the rolls R and R, the paper as it passes between the balls and dies will be cut by the engaging surfaces thereof to form lines of perfo'ations such as shown at P in Fig. 4.

I have found that with the hollow dies and the cooperating spring pressed balls as herein explained, I obtain very effective per forations notwithstanding the paper travels at a high speed between the rolls. The perforations are accurately made, and there is no tendency to tear or mar the paper. Various sizes of hollow dies will cooperate satisfactorily with the same balls. As illustrated in the drawings, the perforating devices may be grouped on the rolls in any arrangement desired. It should be understood however, that I do not limit myself to any particular arrangement for mounting the die elements in the rolls.

Having thus described my invention, I claim i H a 1. The combination of a pair of rolls each equipped with undercut grooves in its surface, blocks adjustably mounted in said grooves to occupy various positions in the rolls, hollow dies mounted in the blocks of one roll in a manner to-enable them to be adjusted radially, and resiliently supported hollow spherical punches mounted in the blocks of the other roll andadjnstable radially therein.

2. In combination with a pair of coacting rolls, a die having an abrupt circular cutting edge arranged to be carried by one of the rolls, a die having a spherical cutting surface resiliently mounted and arranged to be carried by the other roll, each of said dies having a screw threaded mounting in its roll whereby there is provided means for positioning each of said dies on their respective rolls at various positions relative to the peripheral surface of such rolls and in registration with each other.

3. In eombinatioma female die having a circular cutting edge, means for mounting" the die, means whereby the die may be turned to adjust it and means for holding the die in adjusted position, a spherical die member arranged to register with the said cutting edge, means including a threaded sleeve for supporting the spherical die member, and means for turning the sleeve to effeet adjustment thereof relative to the female die. i

t. The combination of a pair of rolls each having a plurality of longitudinal grooves in its surface blocks adjustably positioned in the respectlve grooves, hollow dies screw threaded radially in the blocks in one roll,

hollow casings screw threaded radiallyin the blocks of the other roll, a ball in each casing and a spring in each casing pressing i the ball outwardly.

In testimony whereof, I hereunto affix my signature.

LOUIS J. WILLARD.

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