Transmission of power in a printing device

摘要

Modules, such a paper tray (21), are stacked under a printer (3). Power to drive the paper feed originates from the printer. A housing (9; 27) carries a shaft (17; 33) which is keyed to turn with the housing. The shafts have abutment surfaces (47) which mesh with abutment surfaces on the housing (29). A thrust bearing (51) supporting the housing has a configured bottom to permit limited adjustment by rotation of the housing around a gear (35) at the opposite end of the housing. The tops of the modules under the printer extend past their general frame and have a conical guide surface (23) to direct an entering shaft. The bottom of the modules has an opening (19e) to receive the extended part from a module on which it is stacked. <IMAGE>