Patent GB-184452-A (GB)
Title: Stereotypers' casting machines
IPC: B41D3/02
Filed: 1922-07-21
Abstract: 184,452. Fisher, H. L., and Fricke L. W. Aug. 11, 1921, [Convention date]. Void [Published under Sect. 91 of the Act]. Stereotype, casting. In a casting apparatus for flat stereotype plates, the two parts of the casting-box are mounted and actuated so that they move simultaneously into and out of operative engagement without any chafing of the matrix bars or cast plate against the opposite part of the casting-box. Means are provided to adjust the matrix bars and one of the parts of the casting-box to permit plates of various widths and thicknesses to be cast and heating arrangements for the casting-box, which also per. mit drying the matrices while in casting position are also provided. As shown, the front part 18 of the casting-box is carried by pairs of links 20, 22 pivoted to the frame 15 so that it may be turned by hand from the horizontal position to a vertical position adjacent to the back part 19 of the casting-box, which is carried by parallel links 23 pivoted to the frame. As the part 18 approaches the vertical position, lugs 32a upon its bottom edge engage lugs 31a on the part 19 which is thereby depressed against the action of springs 30, Fig. 5, and moved forwardly into tight engagement with the part 18, the links 20 and lower links 23 then being in line to form a locking-toggle. Screwed bars 33 pivoted to the part 19 are then engaged in notched plates 35 on the part 18 and secured by screws 36 to lock the upper portions of the casting box together. The locks 23 are pivoted to bars 24, Fig. 5, adjustable horizontally in slots in the frame by screws 29 to vary the position of the part 19 in accordance with the thickness of the plate to be cast. A rod 37 pivoted to the part 18 and passing through a bracket 38 on the frame carries a stop collar 40 to limit the outwards movement of the part 18, and a spring 41 may be arranged on the rod 37. The metal pot 42 is pivoted to the frame and provided with a handle 44 for tilting it to make the cast, and is heated by a burner 45, Fig. 5, a plate 49 being provided to direct the flame upwardly to the pot. A burner 53 is provided to heat the part 19, the ribs 19a of which have, openings 19<b> for the passage of the hot gases, and have secured to them a sheet-metal plate 56 lined with asbestos. A burner 50 is also arranged beneath the casting space so that a damp matrix may be inserted in the casting box and dried while the metal is being melted. The edge of the matrix are clamped on the part 18 by side bars 59, 60, Figs. 1 and 8, and a bottom bar 58 which bears against the lugs 32a. The bar 59 engages a recess 65 in the bar 58 and carries tongues 61, 63 engaging in brackets 62, 64 on the side of the part 18, and is also provided with a slot 66 in which engages a tongue 67 on a bracket 68 secured to the bar 58. The bar 60 is carried by an angle bar 76 connected by links 74, 75, 71 to blocks 72 swivelled in brackets 73 on the part 18 so that the bar 60 may be adjusted in accordance with the width of the matrix. To insert and remove the matrix, the bar 60 is raised about the pivots of the blocks 72 and the bars 59, 58 are tilted about the rear bottom longitudinal edge of the latter bar. For casting thin plates, correspondingly thin bars are substituted for the bars 58, 59, 60, and for casting plates with a cored back, the bar 60 is replaced by an angle member 84, Fig. 11, one flange of which is adapted to entend into one of the grooves 81 in the back of the core plate 78 which is secured to the part 19. A bar 82 having its surface flush with the ribs 80 of the core plate is secured to the part 19 and abuts against the bottom matrix bar 58<a> when the parts are in casting position.