Patent GB-175698-A (GB)
Title: Improvements in and relating to casting and assembling types, leads, rules, quads, and typographical line slugs
IPC: B41B5/06
Filed: 1920-10-21
Abstract: 175,698. White, A. E., (Bisey Ideal Type- Caster Corporation). Oct. 21, 1920. Type-casting machines; type-bar-making machines; moulds; matrices; metal pots; trimming type. - A universally adjustable type-casting mould is formed by adjustable upper and lower mould-blocks from which retractable side walls project into contact with the opposite block. Leads, rules, and type-bars are cast by forming an undercut groove in one side of the casting, into which the metal of the next casting flows. (1) The upper mould-block 4, Fig. 1, slides vertically in a top frame 3, and the lower mouldblock 5 slides horizontally in a lower frame 2. A slide 9 forming one side of the mould moves in a slot in the block 4, and the lower block 5 contains a slide 46 which forms the other side of the mould. The block 4 is adjusted vertically to vary the body-size of the mould by means of a wedge 22 operated by a screw 27, the block being drawn up to the wedge by a screw 10. The wedge is locked in position by means of a rack 28 and a screw 38, the rack being adjustable on the wedge through fractions of a point by means of an inter posed spacer. Alternatively, the upper mouldblock may be adjusted by means of a vertical micrometer screw provided with a vernier, the block being drawn up into contact with the end of the screw. The side walls 9, 46 are retracted to open the mould, or the upper frame 3 may turn on a hinge 41, the side walls remaining fixed. The mould is adjusted set-wise by moving the lower block 5 horizontally by means of a screw 47, the adjustment being determined by clamping the matrix between a projection 52 on the mouldblock and a fixed projection 53. When a typebar matrix is used, a piece 53a is inserted to provide a margin on the casting. All four sides of the mould may be water-cooled. The cast types are pushed out into a channel in line with the mould by an ejector 48 having a thin extension 48a and an attachable part 48<b> for large type. The ejector has a pin for actuating the jet-pusher 15, Fig. 4, and may be replaced by an arm 48<d> adapted to engage the face of the type, and forming with the jet-pusher a. forked construction passing around the side wall 46. The motion of the ejector may be shortened for casting leads and rules by removal of an abutment piece which is engaged by the actuating-lever 54. The jetpusher 15 is held by a spring 15<a> against a shoulder on the mould side wall 46 so that the jetcavity corresponds with the set-width of the mould. The mould may be shortened for casting spaces, quads, &c. by means of a reversible plate 56. Fig. 10, arranged to project into the mould. The plate may have a notch 56a to cast a projection for engagement by the ejector. The side wall 9 of the mould may have an adjustable piece to engage the plate 56. (2) For casting leads and rules, the side wall 9 may have an adjustable jetforming member 13<a>, Fig. 7, constituting a continuation of the jet-mould. The wall 9 is fixed with its lower face flush with the bottom of the upper mould-block and a continuous strip is cast. To unite successive castings, an undercut element 46<b>, Fig. 4, is secured to the side wall 46 to produce an undercut groove in the side of the casting which is filled by the metal of the next casting. Hollow furniture, quads, &c. may be similarly cast in continuous strips by means of a core projection on the matrix 56, Fig. 16. (3) Type-bars are cast one character at a time by means of the undercut element on the side of the mould, the matrices 20<1>, Fig. 21, being composed in a holder 21<1> which slides in guides across the front of the mould. As each cast is made. the metal interlocks with the, matrix so that the matrix-holder travels with the casting. Alternatively, the matrix-holder may be shitted by a pawl on the ejector. The machine is stopped at the end of the line by an electric switch operated by the matrix-holder. The metal may over-flow so as to produce a bond at the type face; as shown in Fig. 24. (4) Types may be cast with an overnang by means of oposed slides 32<1>, 33<1>, Fig. 18, or a single slide operated by racks and pinions and secured by screws 38<1>. The plates may be brought together to shorten the mould cavity. (5) The bottom mould-block carries pin-cutters 50. Fig. 1, for cutting nicks in the side of the type. and a groover 51, Fig. 4, for nicking the foot of the type. The jet is broken off by a reciprocating plunger. Leads and rules are cut by a reciprocating blade located in advance of the casting or entering the mould cavity. Furniture and quads are severed by a blade 58, Fig. 16, at one side of the matrix-core. The projections formed by the notch 56<a>, Fig. 10, are trimmed off by a cutter 21<b>. A sliding sprue-plate may be used to cut off the metal at the end of the mould. The nipple-plate may be separated from the mould by springs to prevent it from cooling. The metalpot nozzle and the jet-cavity may be adjustable to bring the jet towards the centre of the mould in casting large types.