Patent ID: 6059471
Filing Date: 2000-05-09
Classification: B41J

Abstract:
A device for transporting a sheet to be printed along a line direction in a printer having a fixed frame, comprising:a carriage constructed to receive the sheet and mounted to be displacable on the fixed frame perpendicularly to the line direction between a starting position for inserting and removing the sheet and an end position moved into the printer;a drive device connected to the carriage so as to displace said carriage;a releasable clamping device arranged to clamp the sheet, said clamping device is mounted on the carriage;an actuator that is selectively actuated to release said said releasable clamping device by coming into engagement with the carriage in the starting position of said carriagea contact rail of said carriage with a bearing surface for a lower sheet edge of the sheet, said bearing surface extending perpendicularly to a plane of the sheet;a clamping lever of said releasable clamping device which is spring-loaded in a clamping direction;an actuating cam mounted on said clamping lever;a control bar on the fixed frame on which the actuating cam is guided during displacement of the carriage, in such a way that, in the starting position of the carriage, the actuating cam bears on a predetermined portion of one side of the control bar with a result that the clamping device is kept released, after the starting position has been passed in a direction opposite to an end position the actuating cam passes an upper edge of the control bar with the result that the clamping device is closed, and during movement of the carriage in the direction of the end position the actuating cam slides along on another side of the control bar as far as a lower end of the control bar after passing said end is placed so as to face the one side of the control bar and during the movement of the carriage in the direction of the starting position slides along on said control bar, the clamping device remaining closed until the carriage coming from the end position runs onto the predetermined portion of the control bar.