An Improved Machine for Depositing Metallic Leaf in Right Lines upon the Covers of Books and the like from a Package Roll.

摘要

17,303. Coe, W. E. Aug. 8. Gilding and silvering.-Consists of a machine for depositing metal from a roll in right lines upon the covers of books &c. Fig. 1 is a plan, Fig. 2 a side elevation, Fig. 11 a sectional elevation on the line 11, Fig. 1, and Fig. 13 a sectional elevation on the line 13, Fig. 1. Fig. 7 is a sectional elevation of the work-holding table, supporting- frame, and reciprocating gear, and Fig. 9 is a plan on the line 9, Fig. 7. The package-roll l of metallic leaf is mounted on a spindle between two hinged plates, which form the depositing-arm T ; the leaf passes around a guide-roller i, when unwound by the forward motion of the carriage E, between the stops F, F1 on the guides C, D, the end of the paper strip being held by the spring- pressed roller w against the drum v. The inner side of the depositing-arm is attached to a plate H, with arms b, b1 rocked on a transverse spindle, to the end of which a depending arm K is attached, by a flat spring a, a1 held by a screw s in a slot in the spindle Q, on which the handle L rocks when pressure is applied to the handle to slide the carriage on the guides. The book cover or work to be gilded (shown by dotted lines in Fig. 1), is held by a spring between the "line gauges" R', the position of which, on the rotatable table A' is adjusted by screws l3 and slots k2. The table A1 is mounted in a pivot bearing D1 in a plate E' which is traversed in guides n1 in the frame B1 by the rack M1, pinion K1, bevel gearing J1, H', and a lever G. The table may be locked in four positions at right-angles, so that each edge of the cover may be gilded in turn, by a spring bolt q1, taking into one of four similarly-situated recesses p1 beneath the table. The bolt is depressed, when the table is run outwards, by the engagement of a spring catch w1 on a bell crank v1 with the catch s1 ; at the same time, a catch P' engages one of the teeth of the star-wheel F2, screwed to the end of the spindle C1, and rotates the table through 90‹. The gauges R' are bevelled at m2, m3 ... m7, so that the depositing-roll i may be run on to the work at each edge ; a screw q2 on a spring blade s1 engages, at the end of each edge, one of the stops n2, n3, n4, n5, and presses the point q3 against the metallic leaf, to sever it. As the carriage is moved backwards, a ball clutch p causes the drum v to rotate and wind up the paper strip, from which the leaf has been deposited, through the pull of the cord U attached to the arm K and passing over idle pulleys o, r and the clutch pulley p to the weight S. To allow for difference in length of the edges of the work, stops f1, g1, set at different angles on a spring-controlled rocking shaft e1, are thrown forward, so as to engage a stop e2 on the carriage, by the engagement of one of the pins c', by the screws a2, b2 on the table A'. An adjustable "stop-gauge" Z limits the inward movement of the table A', so as to bring the edge of the work in line with the depositing-arm. Grooves i2 in the base A permit of the adjustment of the frame B relatively to the frame B1,