Patent GB-540553-A (GB)
Title: Improvements in or relating to typographical slug casting machines
IPC: B41B11/38
Filed: 1941-05-08
Abstract: 540,553. Type-bar-making machines. MERGENTHALER LINOTYPE CO. May 8, 1941, No. 6005. Convention date, Aug. 3, 1940. [Class 100 (iii)] Quadding-apparatus; justifying matrices.- In quadding- apparatus of the kind described in Specification 433,872, wherein, after the closing of the jaws on the line, they are positively separated to a limited extent to permit free expansion of the spacebands, the power means provided for so separating the jaws is alternatively employed for applying a supplementary closing pressure to the jaws in the case of a quadded line which is not to be justified,: in order to avoid the danger of a loose line. As described in the prior Specification, the jaws are closed on the line by the action of a vertically movable rod H, Fig. 12, passing through a slidable sleeve H<SP>17</SP>, the rod and the sleeve being capable of limited relative movement under the control of an adjustable cam V. The rod H is operated by a lever H<SP>3</SP>, Fig. 3, which is actuated through levers H9, H<SP>13</SP> from a cam M<SP>1</SP> on the camshaft of the machine. The rod is locked in its downwardly moved position by a clamp or grip-element J<SP>1</SP>, Fig. 11, which is forced against the sleeve H<SP>17</SP> by a toggle J operated by a link J<SP>2</SP> from the lever H<SP>9</SP>. The clamp J<SP>1</SP> is toothed to engage with teeth on the sleeve H<SP>17</SP>, so that the clamp and the sleeve will move vertically together, as described in Specification 482,047. The rod H is raised within the sleeve H<SP>17</SP> to the extent permitted by the cam V, in order to back off or spread the jaws prior to justification, by a link H", Fig. 3, which engages an arm H<SP>18</SP> of the lever H<SP>3</SP> and is operated through a spring H<SP>22</SP> surrounding a rod H<SP>29</SP> by a second cam M<SP>4</SP> on the camshaft. The link H<SP>21</SP> is not, as heretofore, permanently connected to the arm H<SP>18</SP>, but is pivoted to the rod H<SP>29</SP>, so that it can rock in the vertical plane. The link carries an interponent P having a tooth p, which, in the lower position of the interponent, engages one of several teeth h<SP>6</SP> on the arm H<SP>18</SP>. The action of the cam M<SP>4</SP> then causes the lever H<SP>3</SP> to raise the rod H and spread the jaws. In the upper-position of the interponent, the tooth p is disengaged from the arm H<SP>18</SP>, and a shoulder p<SP>5</SP> on the interponent engages with a hooked arm S. The cam M<SP>4</SP>, in that case, acts through the arm Sand ;connected levers to depress the clamp J and with it the sleeve H<SP>17</SP>, so that additional clamping pressure is applied to the jaws. The position of the interponent is determined by a laterally movable block T carried by the lever-arm H<SP>18</SP>, on which the tooth p can rest. The block is adjustable into any one of three positions by means of a hand-lever. In one extreme position, the block underlies the tooth p and supports the interponent, so that the matrix line is compressed by the cam M<SP>4</SP>. In another extreme position, the block does not support the interponent, which falls into engagement with the arm H<SP>14</SP>, so that the jaws are spread. The block T has a recess in one side, by which the length of its upper surface is reduced. The third position of the block locates this part of its surface below the tooth p. The interponent will then either be supported or allowed to fall, according to the amount the lever H<SP>3</SP> has moved in closing the jaws on the line. By this means, lines shorter than full length by less than a certain amount, say, three ems, will be spread and justified, but lines in which the shortage exceeds this amount will receive the additional clamping-pressure. The interponent is adjustable by means of a screw to vary the amount of shortage within which lines are to be justified. When the line is compressed, instead of being expanded, the justifying-mechanism is disabled by locking the justification-bar against movement. This is effected by two locking-levers, which are adapted to engage a collar on each justification-rod. The levers are moved into active position by a weight when they are released by the upward movement of the interponent P.