US822348A - Stapling-machine. - Google Patents

Description

PATENTED JUNE 5, 1906.

E. M. COBB.

STAPLING MACHINE.

APPLICATION FILED MAY 12 1904 atto'unm 13 1 Human UNITED STATES PATENT- oFFion ELMER M. COBB, OF PORTLAND, MAINE, ASSIGNOR- TO WILLIAM B. HAY,

. OF PORTLAND, MAINE.

STAPLlNG-MACHINE.

Specification of Letters Patent.

Patented June 5, 1906.

construction of the swinging anvil over which the staple is formed, by which it is positively drawn back as the staple-driver descends, an improved construction of the cam which drives the driver and the former, whereby a single cam path or groove is used for both parts, and an improved construction of the vertical rod which operates the clutching-dogs, which admits of cheaper method of manufacture.

I illustrate my invention by means of the accompanying drawings, in which- Figure 1 is a side elevation. Fig. 2 is a section on line a: w of Fig. 1. Fig. 3 1s a section of :20 a; of Fig. 2. Fig. 4 is a rear elevation with the shaft in section. Fi s. 5 and 5 are details of the former and river, and Figs. 6, 7, and 8 are perspective views showing the operation of the anvil.

A re resents the bed of the machine, and B. is t e standard carrying the most of the working parts. G is the cam on the end of the shaft g, which is journaled in the standard B. Immediately in front of the cam and secured to the standard B is a late B, in which are slidably mounted the ormer f and the driver e. These parts are of common construction, the lower end of the ,driver 'fittlng 1n a recess in the lower end of the former, so that their lower operative ends are in the same plane. A groove f is provided in the side of this recess to receive the wire of the staple.

The former and the driver reciprocate vertically in a recess in the plate B, and the wire w is fed laterally into the lower portion of this recess through a tubular cutter d, which is screwed into the side of the plate. The inner end of the cutter comes flush with the recess containing the former and as the former descends it shears 01f the wire to form the staple.

Vertical movement is imparted to the former and driver .by means of the cam G, which has on its front face a single path g, in which moves the cam-roll e of the driver, journaled in a lateral projection e, a similar roll journaled in the lateral projection f 3 of the former.

The path 9 has two concentric sections at different distances from the center, and the two rolls follow each other in this single path and each has the same movement. 1

The staple is bent over a pointed anvil h, which projects out horizontally from the lower end of a swing-segment h, pivoted at the center.

The anvil h projects from back of the plate B underneath the end of the driver, and its motion conforms to the movement of the driver, so that it is always in close contact with it.

Motion is given to the anvil by a vertical rack 1) moving in a vertical guide in the standard B, the rack engaging teeth formed on the edge of the segment 72..

The wire is fed to the machine byfeed-rolls c 0, connected by gears c and intermittently o erated by means of a ratchet-wheel c, w 'ch is actuated by a pawl 0 This pawl is pivoted to a reciprocating slide 0 mounted on the side of the standard by means of screws 0 assing through horizontal slots 0 The slid is thrown first one way and then the other by suitable cam projections c and c on the rim of the cam G acting on a camroll c on the top of the slide 0. The reciprocation of the slide 0" operates to cause the awl to turn the feed-rolls and feed the wire into the machine just far enough to form a staple, and the feed is timed so that it comes .when the driver and former are in their top position.

This feed mechanism forms no part of my invention and any suitable mechanism will answer the purpose.

The rack 1s moved vertically by means of a roll (1, which travels in a path 9 on the back side of the cam. The path is so formed that the anvil is always ke t in close contact with the lower end of the river. The staples are clenched by a pair of clenching-dogs t,piv oted below the bed of the machine. They are formed with two adjacent recesses '1'. in a well-known manner, and playing vertically in this recess is the u per end of the rod 7', having a portion 7" mil. ed out below the upper end, leaving a projection j to operate the dogs. The rod 9 is reciprocated vertically of which are raised. The former first de-' scends by the action of the cam, cutting off the wire and pressin the ends down over the sides of the anvil to orm the staple, the ends lying within the grooves f (See Figs. 6 and 7.) After the former has reached its lower position it stops and the driver takes up the same motion, forcing the staple down, the anvil drawin back at the same time, so that the wire is a ways closely held between the upper surface of the anvil and the lower end 0 the driver. The staple having been driven in, the clenching-dogs are lifted to a horizontal position, clenching the staple. The former then lifts and the driver follows, ready to receive the next staple.

I claim 1. In a stapling-machine, the combination of a vertically reciprocating former and driver each provided with a'oa'm-roll and a cam having a single path in which said rolls travel, thereby imparting to said former and driver like motions, one following the other.

2. In a sta ling-machine the combination of a vertica ly reciprocating former and driver, a swinging geared segment, an anvil formed on sald swinging geared'segment, a

rack engaging said segment and. a oar'nfor reciprocating said rack.

S1gned at Portland this 14th day of-April, 1904.

ELMER M. COBB;

Witnesses:

S. W. BATES, W. B. HAY.

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