摘要:
A paper feed roll assembly for a printer or typewriter having a platen is described. The assembly is fabricated in such a way as to allow simple insertion into the printer or typewriter and the retention of the assembly in a proper position within the typewriter by the engagement of hooks (50) appended to the paper deflector (42, 54) with a paper release bail. Movement of paper release bail (14. 18) will compress a spring (28) which engages roll axle supports (20) and fixed rail (10), allowing the paper deflector (42, 54) and feed rolls (38) to with withdrawn from the periphery of the platen. The device allows automated assembly of the paper feed roll assembly into a machine and, in addition, provides complete self-alignment capability for the rolls (38) with respect to the periphery of the platen.
摘要:
A powered gear driven paper insert and line feed mechanism capable of rotating a platen (10) through spacing increments and which is both power operated and disconnectable for manual operation, is disclosed. The platen (10) of the typewriter or the like may be manually rotated using platen knob (118) or may be electronically rotated by energizing a control magnet (110), thus engaging a dog clutch assembly (44, 74; 48, 76) to connect a drive motor (130) to the platen (110). The clutch assembly (44, 74; 48, 76) is such that two separate dog clutches are operable to disconnect the platen (10) and gear train (56, 92, 94. 96, 98, 14) from the overall clutch apparatus and also to disconnect the drive motor belt (32) and other related hardware which is driven by the drive motor (30) and belt (32).
摘要:
A print mechanism is described which has a constant current driven solenoid (22) acting against an arch-shaped hammer (10) to power the hammer (10) through an arc of powered flight followed by an arc of free flight. The solenoid/ hammer engagement point (24) removes the solenoid to a position which does not obstruct print line visibility and the hammer (10) rest position is withdrawn to improve print line visibility.
摘要:
A powered gear driven paper insert and line feed mechanism capable of rotating a platen (10) through spacing increments and which is both power operated and disconnectable for manual operation, is disclosed. The platen (10) of the typewriter or the like may be manually rotated using platen knob (118) or may be electronically rotated by energizing a control magnet (110), thus engaging a dog clutch assembly (44, 74; 48, 76) to connect a drive motor (130) to the platen (110). The clutch assembly (44, 74; 48, 76) is such that two separate dog clutches are operable to disconnect the platen (10) and gear train (56, 92, 94. 96, 98, 14) from the overall clutch apparatus and also to disconnect the drive motor belt (32) and other related hardware which is driven by the drive motor (30) and belt (32).
摘要:
A replaceable font module (8) for a matrix printer includes an interrogable storage device (12) containing information representing graphic patterns and is connected to cooperate with a corresponding receptacle (100). The module (8) and receptacle (100) are configured to allow insertion without intense operator attention by virtue of a camming surface (48) on the module that cooperates with reference edge (154) of receptacle (100) to provide an undulating but positive latching motion in response to a simple operator insertion motion. As a part of the latching motion, a wiping action of spring contact (134) along contact pad (22) to assure a high quality contact.
摘要:
A paper feed roll assembly for a printer or typewriter having a platen is described. The assembly is fabricated in such a way as to allow simple insertion into the printer or typewriter and the retention of the assembly in a proper position within the typewriter by the engagement of hooks (50) appended to the paper deflector (42, 54) with a paper release bail. Movement of paper release bail (14. 18) will compress a spring (28) which engages roll axle supports (20) and fixed rail (10), allowing the paper deflector (42, 54) and feed rolls (38) to with withdrawn from the periphery of the platen. The device allows automated assembly of the paper feed roll assembly into a machine and, in addition, provides complete self-alignment capability for the rolls (38) with respect to the periphery of the platen.
摘要:
A replaceable font module (8) for a matrix printer includes an interrogable storage device (12) containing information representing graphic patterns and is connected to cooperate with a corresponding receptacle (100). The module (8) and receptacle (100) are configured to allow insertion without intense operator attention by virtue of a camming surface (48) on the module that cooperates with reference edge (154) of receptacle (100) to provide an undulating but positive latching motion in response to a simple operator insertion motion. As a part of the latching motion, a wiping action of spring contact (134) along contact pad (22) to assure a high quality contact.