Abstract: An adjustable shaft mechanism for adjusting the gap between a print head and a platen in a dot matrix printer has a printer frame with two end frame members and a fixed guide member. An adjustable shaft runs substantially parallel to the guide member between the end frame members. A print head carriage runs along the guide and shaft members. A substantially vertical slot in each of the end frame members is employed to adjust the adjustable shaft for movement up and down with respect to the end frame members. Spring loading means biases the shaft toward the guide member. A cam on each end member is mounted for rotation for adjusting the shaft in the slots to raise and lower the print head carriage and the associated print head with respect to the platen.

Abstract: A feed for ticket printers including a magazine having a frame, driven rollers to deliver the bottom one of a stack of tickets to a selection station, the selection station effectively permitting the withdrawal of the bottom ticket while restraining the remaining tickets, and a pair of compression rollers to pull the bottom ticket further through the selection station.

Abstract: A plastic ribbon guide to fit on a print head of a mosaic printer. The printer is a ticket printer which holds the ribbon in a stable position adjacent the tray which also acts as an anvil. The ribbon is kept taut. The ribbon guide has a shape to hold the ribbon in a positive manner.

Abstract: A plastic laminate including a wedge having sides with a large radius and one or two grooved plates, flat when unstressed, and stressed when clamped to the wedge to conform to the radii thereof. The grooves then are three-dimensional and easily guide the print wires of a mosaic printer. Another advantage is achieved in that both wedge and plates can be molded with little or no difficulty in that the wedge mold surfaces are simple to machine, and the plates are initially flat and thus easy to mold. Close solenoid spacing is also made possible.

Abstract: A plastic laminate including a wedge having sides with a large radius and one or two grooved plates, flat when unstressed, and stressed when clamped to the wedge to conform to the radii thereof. The grooves then are three-dimensional and easily guide the print wires of a mosaic printer. Another advantage is achieved in that both wedge and plates can be molded with little or no difficulty in that the wedge mold surfaces are simple to machine, and the plates are initially flat and thus easy to mold. Close solenoid spacing is also made possible.