Patent GB-191303041-A (GB)
Title: Improvements in Stapling Mechanism.
IPC: B41F13/66
Filed: 1913-02-05
Granted: 1913-11-06
Abstract: 3041. Hoe & Co., R., [Hoe & Co., R.]. Feb. 5. Stapling and discontinuous wire-stitching.-In a machine for stapling the product of printing- machines on the run, wire from a reel is fed between feed-wheels 10, 7 driven from a main shaft 6. To vary the rate of feed, the feedwheel 10 is mounted in a bell-crank bracket 17, which is adjustable along a stud 18 to bring the wheel 10 opposite other feed-wheels 8, 9 of varying diameters. A spring plunger and a screw stop hold the wheel 10 in operative relationship with the selected wheel. The wire passes from the feed - wheels to a presenting- device so situated that an amount of slack is left in the wire. The presenting-device includes a plate 32, Fig. 7, in a slot in which is fitted a guide-block 33 having a groove 34' for the wire. From the block 33, the wire passes between rolls 35, 36 and a pivoted spring-pressed roll 40, acting as a check device against back feed, into a groove in a finger 41 extending up to the rotary carrier 42 for the staple forming and driving devices. The carrier, which is provided with a groove 52 for the wire, is provided with a number of staple forming and driving devices each comprising a stationary jaw 44 and a pivoted jaw 47, which is normally pressed against the stationary jaw by a spring 48 but is adapted to be pressed back for the jaws to receive the wire by a pin 65 in the carrier engaging a cam 68 in the machine frame. After the wire has been gripped by the jaws, it is drawn downwards by an inward movement of the jaws to give it a slight bend thus clamping it between the jaws and their socket. The wire is then drawn forward by the rotation of the carrier and the desired length is cut off by the operation of a pivoted knife 85 from a cam 95 on the machine frame. The jaws, holding the severed length, are then drawn into their socket in the carrier, the sides of the socket bending the wires up to form the legs of the staple. The reciprocatory motion of the jaws is given by a stationary cam-block 53, in a cam in which a cam roll rides mounted on a crank arm 58 at the end of a shaft 60 mounted in a bearing in the side of the carrier 42. Each staple-forming element in the carrier is provided with one of these shafts. The shaft 60 carries a crank arm 62 carrying a pin 63, which engages in a hooked projection 64 on the block carrying the jaw 44. In some cases, it is desirable to prevent the operation of the staple forming and cutting mechanism. For this purpose, the low part 69 of the cam 68 may be advanced to the level of the high part, thus always maintaining the jaws open. The part 69, which is held retracted by a spring, is adapted to be pushed forward by one arm 73 of a lever the other end of which carries a cam roll 78 operated upon by a cam 79 which may be driven at any desired speed by varying the gearing connecting it to the main shaft 6. By this means the jaws may be maintained open during any desired staple-forming period. The cutter cam 95 is moved by a bar 96 having inclined parts engaging corresponding inclines on the cam bar and thus holding the bar advanced or retracted. The bar 96 is connected through links and levers with the mechanism operating the jaw cam so as to act simultaneously therewith. After the staple has been formed, it is driven through the paper and its legs clinched. For this purpose the carrier co-operates with a second rotary carrier 106, which may be the collecting-cylinder of a printing-machine. This cylinder carries a number of clinching-devices each comprising a pair of members 107 pivoted in a block 108 and adapted to be turned to clinch the legs of the staple by a plunger 110 actuated by a hammer 111 forming one arm of a rock-shaft 112 mounted in the side of the cylinder. As the carrier with the formed staple comes opposite a clinching - device the staple is driven and clinched, the staple forming and holding jaws being opened to release the staple after driving by a cam 109 on the frame. Each rock-shaft 112 has a crank-arm 113, with a pin on which is mounted a roll 115, Fig. 16. The rolls run on a track 116 formed in a stationary cam-plate, and are pressed outwards against the track by spring plungers 127 socketed in a hub on the shaft with which the cylinder 106 rotates. The track 116 is cut away in one place to permit the shaft 112 to be rocked by the plungers 127 for the purpose of clinching the staples. In order to obtain a sudden movement of the shafts, the pins on which the rolls are mounted are provided with bearing-blocks 123 situated just inside the cam rolls. The bearing-blocks have square faces which co-operate with an adjustable governor block 117 projecting beyond the break in the track 116. As the square faces of the blocks move clear of the governor block 117, the arms 113 move freely and a sharp clinching action results. The blocks 123 are free to rock slightly on their supporting-pins. When it is desired to stop the clinching operation at any desired period, a pivoted block 130 operated by a cam roll 134 bridges the gap in the track 116. The cam 135 for the cam roll can be rotated at the desired speed bv adjustable gearing. If it is desired to run the carrier 42 only, without operating the stapling-mechanism, the low part 69 of the cam 68 can be pushed forward by a hand-operated controller 145 which can be locked in its forward position.