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361,019. Bookbinding-machines. SCHRAMM, C., 91, Sylvan Avenue, West Hartford, and CLARK, E. W., 8, Nepaug Street, Hartford, both in Connecticut, U.S.A. Sept. 1, 1930, No. 26079. [Class 16.] In a machine for back-lining books, the fillers are fed into the machine edgewise with their backs downwards, and are raised by an elevator into the grip of clamps on an endless conveyer by which they are moved past a number of stations at which adhesive and crash are first applied, and, afterwards, paper back-linings and head-bands. The conveyer comprises two endless chains 1, Fig. 1, which pass around sprockets 2, and have secured between them clamps comprising fixed and movable jaws 7, Fig. 7, pressed together by springs. The conveyer is intermittently driven through a toothed wheel 11, which is adjustably secured to one of the sprocket shafts by means of a worm 13 gearing with a toothed disc. The toothed wheel 11 gears with a toothed segment 15, which is rocked by a lever 19 and a cam on the cam shaft 24. The segment 15 can slide on its shaft, and is moved out of gear with the wheel 11 by a cam-actuated lever before the return movement of the segment begins. A toothed latch 31 holds the wheel 11 stationary while it is free. The clamps on the conveyer are opened at the loading and discharge stations by sliding bars 40, 53, which are reciprocated by toothed segments, and are adapted to engage and retract the movable jaws of the clamps. The fillers 61, Fig. 7, are placed by hand back downwards on a runway 62 between laterally adjustable side walls 63. Each filler is pushed past a spring latch 67, and is then fed on to an elevator by a reciprocating finger, which slides along a shaft 74 and is turned in behind the filler. As the elevator rises, the filler is positioned exactly on it by a sliding stop. A spring- raised stop 68, which is depressed by the elevator in its descent, prevents a filler from being pushed beneath the raised elevator. One of the walls 63 of the loading runway has a vertically movable section to hold the leaves of the filler together, so that they will enter the clamp. - The conveyer carries the filler to an idle second station, and then to a third station, at which adhesive is applied to the back by a roll 113, Fig. 1. The roll 113 dips into a tank 117, Fig. 20, and is reciprocated across the back of the filler by levers 116, 125, which form a parallel-motion device, the roll being rotated by a train of gears 131. The filler is then advanced through an idle fourth station to a fifth station, at which a strip of crash is fed, cut off, and applied. At the following stations another strip of crash is applied. The crash is drawn into the machine by intermittently-driven feed rolls, and the strips cut off are drawn endwise beneath the fillers by gripping fingers on a reciprocating slide. The strips 'of crash are supported on plates 175, Fig. 30, on a vertically sliding frame 206, the edges of the strips being held by gripper bars. As the frame rises, the gripper bars are opened and the crash 214 is applied to the backs of the fillers. After each application of crash, pairs of blades 205 stretch the crash around the filler. Should a filler not be present in the clamp, the crash-feeding mechanism is disengaged by means controlled by a feeler pin, which is projected towards the clamp. A second application of adhesive is then made by a roll 238, Fig. 1, after which the back-lining and head-bands are applied. A strip of paper 239, Fig. 37, from which the back-linings are cut, is drawn into the machine by rolls 240, 241, and passes between cutters 242, which trim the edges to the width required. Cords or narrow strips of fabric 269, to form head-bands, are drawn into the machine by the feed rolls 240, and are applied to the edges of the back-lining strip, which have been coated with adhesive by discs 270. The back-lining feed mechanism is controlled by trip mechanism similar to that for the crash feeds. The feed rolls are intermittently driven by gearing from a rocking segment 255, which is connected to its shaft by a pawl 257. If the conveyer clamp does not contain a filler, a feeler pin, which is projected towards it, withdraws the pawl 257 and interrupts the feed. The back-lining is cut by knives 302, 303, and the severed piece is left on a horizontally sliding table 310, Fig. 35, to which it is held by air-suction effected by tubes 331, which are connected to a vacuum pump. The table is drawn beneath the filler by levers 315, and is then lifted, in order to apply the back-lining to the filler. The back-lining and head-bands are rubbed on to the back of the filler by a succession of rolls 340, Fig. 1, which are preferably pneumatic, and are reciprocated horizontally. The first three of the rolls are moistened by being brought into contact with a roll rotating in a water-tank. At the last station, the conveyer clamp is opened, and'the filler is allowed to drop on to vertically moving arms, which descend and deposit it on an horizontally travelling delivery chain.
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