Abstract: Disclosed is a sheet feeding device for printers and the like, which comprises a detachable holder for thick cut sheets. In this device, thin ordinary cut sheets, supported in a pile by paper supporting means, are delivered one by one in a sheet feeding direction by feed rollers, which are in contact with the uppermost one of the sheets. In feeding relatively thick cut sheets, such as postal cards and other cards, the holder carrying the sheets thereon is detachably mounted on the supporting structure. The holder includes a supporting member for supporting the leading ends of the thick cut sheets, with respect to the sheet feeding direction. The supporting member has a slanting or curved guide surface. As the feed rollers rotate in contact with the uppermost one of the thick cut sheets, the sheets are delivered, sliding on the guide surface.

Abstract: A document feed device provided with a pin tractor assembly which includes a pin tractor member supporting a number of feed pins and rotated by a feed shaft, and a body member nonrotatably mounted on the tractor member. Elastically deformable projecting bar with a slit protrudes from the body member. A stationary frame member is formed with a slot extending in the axial direction of the feed shaft. An eyelet portion is formed at each end of the slot. The projecting bar elastically engages the slot, thereby preventing the body member from rotating. As the rotating bar slides within the slot, the pin tractor assembly can move along the feed shaft so that its position is adjusted according to the width of a perforated sheet of material. The assembly may be located in either of two positions, depending on the width of the sheet, as the projecting bar alternatively engages the eyelet portions of the slot. The position of the assembly is shifted by manually operating a knob formed on the body member.

Abstract: A document feed device provided with a pin tractor assembly which includes a pin tractor member supporting a number of feed pins and rotated by a feed shaft, and a body member nonrotatably mounted on the tractor member. Elastically deformable projecting bar with a slit protrudes from the body member. A stationary frame member is formed with a slot extending in the axial direction of the feed shaft. An eyelet portion is formed at each end of the slot. The projecting bar elastically engages the slot, thereby preventing the body member from rotating. As the projecting bar slides within the slot, the pin tractor assembly can move along the feed shaft so that its position is adjusted according to the width of a perforated sheet of material. The assembly may be located in either of two positions, depending on the width of the sheet, as the projecting bar alternatively engages the eyelet portions of the slot. The position of the assembly is shifted by manually operating a knob formed on the body member.

Abstract: In a ribbon guide device used in a printing machine, a second ribbon guide arm member out of first and second ribbon guide arm members provided individually at a pair of ribbon aperture portions of a ribbon cassette can be attached to and removed from the ribbon cassette. An effective printing ribbon portion is stretched between the first and second ribbon guide arm members. When the second ribbon guide arm member is attached to the ribbon cassette, the stretched ribbon portion covers a part of the traveling stroke of the printing head. The second ribbon guide arm member can also be attached to and removed from a mounting section of the frame of the printing machine. When the second ribbon guide arm member is attached to the mounting section, the stretched ribbon portion covers the whole traveling stroke of the printing head.

Abstract: A printer having a print head with a mounting portion, and a carriage with a supporting structure engaging the mounting portion of the print head to hold it in place on the carriage. The supporting structure includes a lateral positioning portion for positioning the print head laterally in a direction of movement of the carriage, a downward positioning portion for positioning the print head downwardly of the carriage, and a rear wall for receiving a force of reaction of the print head upon printing action on a platen. The printer comprises a biasing device for biasing the mounting portion of the print head downwardly and rearwardly against the downward positioning portion and rear wall of the supporting structure of the carriage, respectively. The carriage may include a serrated portion fixedly engaging a toothed belt for driving the carriage along the platen.