Patent GB-308153-A (GB)
Title: Improvements in or relating to typographic casting machines
IPC: B41B7/04
Filed: 1928-09-19
Abstract: 308,153. Lanston Monotype, Corporation, Ltd., (Lanston Monotype Machine Co.). Sept. 19, 1928. Single-type composing and casting machines; moulds.-A machine for producing elements of printing- formes, such as types or strip material, is adapted for casting either by an additive or fusion process, as described in Specification 7202/15, or by a non-fusion separate casting process, as described in Specification 113,262, without the necessity of cutting the material to length. The exit side of the mould is closed when types are being cast, and, when strip material is being cast, governing mechanism is provided, which automatically controls the castejecting device, so that a desired number of fusion or additive casts are followed by a non-fusion or separate cast. General construction of mould. The mould comprises a base 22, Fig. 12, containing an opening 21 for a nozzle seat 24, and having mounted on it two wearing-plates 25, 25', between which fit an adjustable blade 26 and a reciprocating cut-off blade 28, adapted to open and close the metal-inlet. Upon the base are secured cheekblocks 31, 32, between which are type-blocks 34, 35, the block 35 having a.main section and a separate exit section or gripping-piece 35<1>. The type-blocks are separated by point-blocks 39, 40<1>, and between them slides the mould-blade 40. The cheek-block 31 is notched to receive a sliding cross-block 41, which, when extended across the mould-cavity, contacts with the rear type-block. 34. The cross-block slides in contact with an abutment-block 44, which is notched to receive the end of the type-block section 35<1>, and forms a continuation of the main section of the type-block 35. The mould-blade is bridged by a squaring-block 47, to which is secured the front stop 49 for the blade. The mould-cavity formed between the type-blocks and cross-block may be adjusted both lengthwise and crosswise in relation to the nozzle opening 21. A friction clamp in the form of a sliding pin 50 engages the type-block section 35<1>. The crossblock is advanced by a spring and retracted by a lever and a cam. The end of the block is stepped, and is provided with gripping-ridges to grip the cast when pressed against it. 'The cutoff slide 28 is retracted to an adjustable extent, in order to open the metal-inlet, by means of a lever and a cam, and is closed by a spring. The cam is so shaped as to cause a quick closure of the slide. Mould-blade actuation. The mould-blade, may be solid, or may be made up of parts, as shown in Fig. 19, for casting types or strips of the form shown in Fig. 18. The compound blade consists of a central member 57 and channel members 58, 59, separated by stationary core members 55, 55<1>. The movable members are connected by a pin 62, and have lugs 64 for engaging the driving- mechanism, and lugs 61 for engaging the front stop 49. The mould-blade is operated by a lever, acting through a spring link 69, shown in plain in Fig. 5, on a bell-crank lever 67, which is connected by a link 70 to one of a pair of tong-levers 71, 75, connected together by a link 74. One end of the tong-lever 75 is connected by a link 77 to the machine frame, and the other to a slide 78, Fig. 16, which is coupled to the mould-blade 40. A raised portion 80 of the slide 78 travels in a slot 83, Fig. 15, in a carrier 73, to which the tong-lever 71 is pivoted. The carrier 73 is urged to the left by a spring 87, Fig. 17, against a wedge 91, having an adjusting-screw 95 and a scale 101, whereby the rearward position of the mould-blade is determined. Matrix-operating mechanism. The matrix is raised and lowered by a support 177, Fig. 17, sliding vertically in a guide 178, and operated by eccentrics and a rack and pinion. The guide is adjustable both lengthwise and laterally of the mould. The lower portion of the support is in the form of a hollow box having inclined top and bottom walls, so as to form an angular shoot, into which the matrix-holder 185 may be slid. The holder is in the form of a block having a recess, in which the matrix is held, and is inserted and withdrawn by means of a pivoted handle 189, which serves to lock the holder in the support 177. Determining length of cast. In casting types, the type is ejected beyond the cross-block, which can return to closed position for the next cast. In additive casting, the ejecting stroke is shortened, and the cross-block presses against the ejected cast. The reduced ejecting stroke is caused by an interponent 193, Fig. 17, which is inserted between the front mould-blade stop 49 and the lug 61 on the blade. The interponent is carried by a lever 200, Fig. 5, mounted loosely on the shaft of a setting-drum 196, and caused by a spring to lift the interponent to operative position. The drum is previously set by hand in accordance with the number of casts, and is rotated step by step against a spring by ratchetmechanism operated from the pump-lever, so that after a predetermined number of casts, the drum acts on the lever 200 and withdraws the interponent. The cross-block is thereby permitted to advance, and the strip is terminated. The additional movement of the mould-blade trips the ratchet-feed of the drum, so that the cycle of operations is repeated. Metal-pumps.-The pump is operated through a lever and a rod having a slotted head, in which the end of the lever rests. The lever is locked to the rod by a pivoted binding-handle, which may be depressed, so that the lever oscillates idly in the slot.