Patent GB-238844-A (GB)
Title: A new or improved machine for use in the manufacture of typographical matrices
IPC: B41B11/00
Filed: 1925-02-20
Abstract: 238,844. Mergenthaler Linotype Co., (Assignees of Hochuli, H. R.). Aug. 20, 1924, [Convention date]. Printers' apparatus.-A machine for operating on typographical matrices, particularly those employed in machines known under the Trade Mark " Linotype " machines, has means for feeding the matrices singly to holding jaws in which they are operated upon by non-rotating picking-tools having a combined oscillatory and reciprocatory motion and serving to remove obstructions. formed during manufacture in the formative cavities or characters, and means for trimming the sides of the matrices to remove burrs formed by the picking-tools. The matrices X are placed in a shoot A, Fig. 1, and are fed forwardly by a slide A' and a suspended weight, a lever and trigger A<3> being provided for holding the slide in a retracted position during insertion of the matrices. The first matrix is acted upon by a plunger B<2> adjustably attached to a slide B reciprocated by a cam B<1> and lever B<5>, to force, it between jaws E, E<1>, Fig. 7, the latter being fixed and the former pressed forwardly by a spring E<3>. A plate F having lugs F<1> prevents the matrices from lifting during operation and a recess E<8> is provided in the jaw E to accommodate burrs on the matrix sides. A spring plunger B<3>, Fig. 1, opposes the motion of the slide B and takes up any lost motion in the parts. While held between the jaws, the matrices are acted upon by conically pointed tools G, Fig. 11, two being provided for acting on " two-letter " matrices. One tool is secured in a clamp G<8> vertically adjustable by set-screws in a holder G<3> pivotally mounted on a carrier G' having a shank G<2> which is inserted in a vertically reciprocating head, and the other tool is secured in a clamp G<8> vertically and horizontally adjustable by means of set-screws and a rotatable nut G<6> respectively. The shank G<2> is secured by a screw J<1>, Fig. 6, in a sleeve J slidably keyed within a second sleeve J<2> rabatable within a bushing H<6> in the head H vertically reciprocated by a cam H', Fig. 5, and a lever H<3>. At each reciprocation of the head H, the carrier G<1> is oscillated in the bushing H<8> to give the tool a picking action by means of an eccentric J' connected by an adjustable link J<5> to a crank J<3> secured to the sleeve J<2>. After the obstructions have been removed from one side of the matrices, the latter are passed through the machine in a reversed position for operation on the other side, and since the matrices are not symmetrical the position of the tools is adjustable for the second operation by means of a stationary rotatable nut J<8>. Fig. 6, engaging threads on the sleeve J. Should the tools meet undue resistance, the holder G<3>, Fig. 11, will oscillate in the carrier G' ,against the action of a spring clamp G". A single tool having a pair of end picking portions, preferably relatively adjustable, mav be used in place of the two tools and single tool with a flat point may be used on matrices for larger type. When the matrices have been acted upon by the tools G they are pushed by the slide B past trimming-cutters K, Figs. 6 and 7, which remove any burrs formed by the tools. A slide K<1>, pressed by an adjustable. spring K<2>, keeps the matrices in contact with the cutters, but yields should the cutters fail to remove the burrs, its forward position being limited by a projection E<7> on the movable jaw E engaging a recess k. After passing the trimming-cutters the matrices are arrested by a spring stop O, Fig. 7, and are ejected along a channel D<4> by a plunger L having a head L<2> and actuated by a bell-crank lever L<3>, Fig. 5, connected by a link L<4> to the cam-actuated roller H<4> which reciprocates the tool-head H. From the channel D<4> the matrices pass into a galley M, Fig. 1. The rotary shaft C on which all the controlling cams are mounted is driven by a twospeed pulley C<2> and a spring clutch C<1> controlled by a hand-lever C<3> having a latch C<5> for locking the clutch in the open position. The Specification as open to inspection under Sect. 91 (3) (a) comprises also a modification in which the picking tools are stationary and the work has the combined movement. This subject-matter does not appear in the Specification as accepted.