Abstract: A method and device for locking and unlocking a print head assembly along a shaft in an addressing machine. The print head assembly is fixedly mounted on a locking mechanism, which comprises a cylindrical body slideably mounted on the shaft and a cam ring rotatably mounted over the cylindrical body. The cylindrical body has a slot for seating an elongated spline. When the locking mechanism is operated in a locking position, the inner circumference of the cam ring presses the spline against the shaft, preventing the cylindrical body from moving along the shaft. The cam ring has a relief on its inner circumference such that, when the cam ring is rotated to the unlocked position, the spline is partially seated in the relief, thereby reducing the pressure exerted by the spline against the shaft. As such, the position of the print head assembly can be adjusted.

Abstract: An integral locking device for a typewriter is used to safeguard against damages and to prevent a correction ribbon from feeding when the typewriter is transported. The integral locking device locks a carrier in a predetermined channel position, locks the correction bail on the carrier to prevent correction ribbon feed, and jams a correction ribbon feed release device.

Abstract: In a printing apparatus comprising a printing head unit reciprocatively movable along a platen within a frame, provided are a memory unit for storing printing data, and means for supporting the memory unit in such a manner that the memory unit is selectively positioned out of the frame or within a spacing formed inside the frame for reciprocative movement of the printing head.

Abstract: In a carriage fixing mechanism for a printing apparatus, engaging openings are formed in a frame disposed at a side portion of the printer and a side portion of a carriage, respectively. The mechanism includes a fixing member. The fixing member includes a first engaging portion to be detachably engaged with the opening of the frame and a second engaging portion to be detachably engaged with the opening of the carriage.

Abstract: The printer, in which a carriage carries a printing head and reciprocates along a guide rail, comprises a locking member attached in the vicinity of the end portion of the guide rail for locking the carriage temporarily, further comprises the locking member arranged to the position toward the locking member attached in the vicinity of the end portion of the guide rail. The locking member is attached to the lever which adjusts the print gap.

Abstract: A printer comprises printing means; a carriage on which this printing means is mounted; an endless, loop-like timing belt, fixed to the carriage, for moving the carriage, the surfaces of this endless belt which face with each other having serrated toothed portions; and a member for sandwiching the endless belt to stop the movement of the carriage. This printer may be also provided with an intermediate engaging member which is interposed between the upper and lower belts of the endless belt. This engaging member has serrated toothed portions having the same pitch as that of the serrated toothed portions of the endless belt. With this simple constitution, the carriage can be easily locked and unlocked without using special tools such as a screw and a screwdriver.

Abstract: An improved typewriter escapement disengagement and engagement mechanism wherein a separator member disengages the escapement mechanism from the carriage rack to prevent damage to the mechanism and/or rack during transport of the typewriter. A restraining means prevents the carriage from moving while the escapement mechanism is disengaged. When the restraining means is removed causing carriage movement, the separator member is automatically removed from between the escapement mechanism and the carriage rack and the escapement mechanism is engaged.

Abstract: A carriage locking device is used for locking a transversely movable carrier in a typewriter to safeguard against damage when the typewriter is not in typing use, especially during shipping transport. The device includes a pair of blades operable between a released position for enabling the carrier to travel sideways and a locked position for engageably holding the carrier fast in the typewriter. A lock control linkage is coupled to the blades for allowing the operator selective movement thereof to shift the blades between the two positions. The blades move into and out of a recess on the carrier which is only allowed to occur when the carrier is stopped at a predetermined location. A sensor lever includes a latching feature that operates in response to the carrier being away from the predetermined location to block movement of the lock control linkage for maintaining the blades in the released position.