Improvements in or relating to discontinuous wire stitching or stapling machines

摘要

453,300. Stapling. CAMCO (MACHINERY), Ltd., 63, Farringdon Street, London, and PRATT, W. A., 162A, High Street, Watford, Hertfordshire. June 21, 1935, No. 17926. [Class 89 (iii)] A stapling or discontinuous wire - stitching machine, for operating on book signatures, folded sheets, &c., of the kind having a travelling work carrier, for collecting and forwarding the work, which is adjustable towards or from the stitching saddle in accordance with the size of the work, is provided with an extensible bridging device for bridging the gap formed when the carrier is adjusted away from the saddle. As shown, the machine comprises a stitcher head S with stitching saddle 11, a bridging device B, and a travelling work carrier C. The latter consists of fixed saddle plates 33 carried by arms 23 vertically adjustable on standards 22, and a chain of roof-shaped links 15 passing over sprocket wheels 16-18, the wheel 17 being driven. The wheels are journalled in bearings 19, 20 which are interconnected by bars 27, 28 and are adjustable along guide rods 21 supported by the arms 23. Adjustment is effected by a lever 30, and the chain is tensioned by screws 31. The bar 28 guides the upper run of the chain, and the lower run is guided by the bar 27 and a bracing bar 26 and rollers 38. The links 15 are fitted at intervals with pusher fingers 35 which cooperate, at laying-on stations 36, 39 with arms 40 supported above the chain, with freedom for upward pivotal movement only, on brackets 41. The means for bridging any gap formed between the chain and the saddle 11, consists of a cable 42, which is secured to a bridgeshaped nose piece 43 in front of the chain, passes over a pulley 44 arranged between, and at the apex of, the plates of the saddle 11, and is wound on a drum 46. The latter is turned, to tighten the cable, by a handle 50 and a ratchet wheel 47 held against clockwise rotation by a pawl. The cable may be wound on the pulley 44, or the drum 46 may be spring- loaded so that the cable is wound or unwound as the chain 15 is adjusted. Movement of the work along the bridging cable 42 and on the saddle 11 is effected by a driven roller 51 and a co-operating roller, not shown, mounted to be moved into and out of engagement with the roll 51 in time with the operations of the stitcher head. In a modification, the bridging device consists of several telescoping roofshaped members, which may be extended or contracted by hand or spring means. The end members, or only one of them, may be secured rigidly to the member 43 and /or to a bracket on the saddle 11.