Patent GB-236391-A (GB)
Title: Improvements in or relating to machines for producing printing elements or material
IPC: B41B5/12
Filed: 1924-07-25
Abstract: 236,391. Lanston Monotype Corporation, Ltd., (Lanston Monotype Machine Co.). July 25, 1924. Single-type composing and casting machines; moulds.-Machines of the kind described in Specifications 7202/15 and 113,262 for casting strip material for use in printing-formes are adapted to produce elements of either definite or indefinite length at will, and are provided with an interchangeable mould unit. The parts of the machine are supported on a casting 2, Fig. 1, mounted on a base 1, and are operated by a camshaft 6, connected with a driving-shaft 25 through change-speed gearing 22, which is controlled by a handle 33. The mould-blade is operated by a lever 13, connected through a spring-box 67 to a bolt, which is passed through one of a series of holes 69, 69<1>. Fig. L0, in a lever 70, which actuates the mould-blade carrier 72. The holes 69, 69<1>, enable the stroke of the mould-blade to be varied, so that it is advanced to a position slightly beyond or a considerable distance beyond, the molten metal inlet, accordingly as fused or non-fused elements are to be cast. The blade-cairrier 72 slides in a guideblock 75, and its movement is limited by two stops 78, 79 having inclined faces, which slide on inclines on the block 75, and its movement is limited by two stops 78, 79 having inclined faces, I which slide on inclines on the block 75, the stops being adjusted by means of micrometer-screws 87, 87<1>, Fig. 1. The mould-blade is connected to the carrier 72 either directly or, in the case of a thin short blade, through an extension member. Strengthening-ribs on the blade or its extension slide in grooves in the mould. The mould is provided with a base-plate 94, Figs. 13 and 22, having a conical hole for the pump-nozzle 17, and a circular nozzle-plate 97. A conical sheet-iron shield 171, separated from the plate 94 by non-conducting material, is provided to keep the nozzle hot. The base-plate carries two thin lining-plates 98, 99, which are spaced apart to form guides for a reciprocating mould-closure slide 100 and a co-operating abutment 101. A reversible stop 102 provides two positions of adjustment for the abutment 101. Above the base-plate are bolted two water-cooled side-blocks 111, 112, spaced apart to receive between them an exchangeable mould-unit comprising two type-blocks 113, 114, separated by point-blocks 115, 116, and held together by screws 117. The mould-blade 89 slides between the type-blocks and below one of the point-blocks. The mould is located between upstanding gauges 125 on the base 94, which engage the ends of the pointblocks. One of the type-blocks has a spring tongue 124, which is engaged by a screw 138 in one of the side-blocks, in order to hold the ejected product frictionally. The central portions of the side and type blocks are cut away to form a recess in which are located matrix-guide blocks 141, 142, these being positioned against the projecting ends of the. point-blocks 120, 121, and clamped to the side and base blocks. The guideblocks form between them a matrix-well 149 adapted to receive and guide a matrix 150 and its holder 151. The lower face of the matrix may be plain or may have a formative impression, and, if necessary, is raised and lowered by a lever 17, Fig. 1, acting through a spring and togglelevers 154, 156,. Metal-pots and pumps.-The pump-mechanism is similar to that described in Specifications 8633/99 and 21014/07, but is provided with means for varying the timing of the pump operation in relation to that of the mould-closure slide, such means comprising a number of pivoted plates 52<1>, Fig. 1, one or more of which can be interposed between the actuating cross-head 51<1> and the free arm of the releasing-latch 65. The metal-pot nozzle 170, Fig. 24, has a passage 170<1>. which branches into a number of outlets 170<11> arranged in the plane of the mould. The metal passing through the outlet nearest to the exit of the mould may serve to wash the end of the section last cast, so as to secure fusion thereto, and the other outlets serve to fill the mould quickly. The pump-operating mechanism can be disconnected from its actuating cam-lever 15, Fig. 1, by means of a handle 47.