Patent GB-726238-A (GB)
Title: Improvements in or relating to type bars and printing formes
IPC: B41B11/00
Filed: 1953-03-18
Abstract: 726,238. Printing-surfaces; type-bar-making machines; distributing type. MERGEN.- THALER LINOTYPE CO. March 18, 1953 [March 18, 1952], No. 7453/53. Classes 100 (2) and 100 (3). [Also in Group XXII] Types.-A method of manufacturing a plurality of printing slugs formed with selective means arranged selectively in various longitudinal positions on the various slugs enabling one or more slugs to be separated from other slugs in a printing forme, comprises casting the slugs with end extensions carrying locating means formed in selectively different positions on the various slugs for determining the longitudinal position of the slugs in relation to means for forming the desired selective means, forming the said selective means and then removing the end extensions from the slugs. Type-bars 1, Fig. 15, are provided in their lower faces with notches 3a-3g, there being one notch missing in each bar from a desired one of seven positions. Type-bars are cast with non-printing extensions 1a, Fig. 11, and lugs 4 in selected positions thereon, the extrusions being cut off after the notches have been formed. Rules.-Rules are provided with notches the same as those formed in the type-bars 1. Moulds.-Set into the rear face of the lefthand matrix-clamping jaw 8, Fig. 2, of a linecasting machine is a vertically slidable plate 11 having seven recesses 11a-11g. The plate is controlled by an indicator knob through a gear 17 and rack, and whichever recess is thereby positioned in the casting line becomes part of an extension of the mould cavity, with the result that a slug is cast having a non-printing extension with an upstanding lug in a desired one of seven positions according to the setting of the knob. Cutting notches in printing slugs.-The slugs 1, Figs. 7 and 11, which may be type-bars with non-printing extensions la or rules, are placed on a stationary tray and in a frame 20 slidably mounted on a table 22, and are separated by partitions 23..Upstanding lugs 4 are aligned between a bar 24 and a handle 26,.and the slugs are clamped by means of a bar 27 actuated by screws 28. The frame 20 is then moved by means of a handle 36 so that the slugs pass off the tray and into contact with rotary cutters 29 mounted on a spindle 30 rotated by an electric motor 31, so that notches 3a-3g are cut in the slugs. A gap between two sets of six cutters causes a notch to be omitted from one of the seven positions a-g, while extra notches 3x may be cut in the extension 1a. The extensions 1a are then cut off, so that the grooves 3x have no significance. Separating slugs from printing formes.--For use in classified advertisements, a forme is made up in a chase 40, Fig. 13, of type-bars 1, Fig. 15, having notches as described above, arranged in columns separated by vertical rules, each advertisement being separated by horizontal cut-off rules. In each type-bar, the position of the absent notch is selected (when casting) according to the day in the week after which the corresponding advertisement is to be discontinued. A series of rails 56, one for each column, are arranged to be vertically reciprocable in slots 55 in a special table 41, on which the chase is positioned between clamps 42, 43. By means of a handle 47, the clamps are moved laterally so as to position the forme in such a way that the rails are in alignment with those positions on the type-bars corresponding to the day of the week. The rails 56 are then raised by means of a handle 60. In the case of typebars no longer required, there will be no notch in alignment with the rail, and the type-bar will be raised out of the forme, and can then be manually removed therefrom. Alternatively, seven rails could be provided for each column, and the wheel 47 used to select which rails will be lifted by the handle 60. If it is desired to raise the slugs which are to be continued in use instead of those finished with, each slug would require only one notch in the one position where a notch would be absent in the previous arrangement. To avoid causing the slugs to lift at one end, the notches can be confined to the centre portion, reducing their number by using code combinations to co-operate with more than one rail. If desired, only one slug of each group forming one advertisement need be notched, or alternatively the notches can be provided only in the cut-off rules, the raising of which would indicate that the entire group is to be removed.