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Patent Agency Ranking
公开(公告)号：DE68907111D1
公开(公告)日：1993-07-22
申请号：DE68907111
申请日：1989-02-28
Applicant: IBM
IPC: B41J25/304 , B41J25/308
Abstract: A printhead (19) is adjusted automatically or manually with respect to a platen (12) in accordance with the thickness of a recording medium. When a host data processor sends a control signal to the printer microprocessor to indicate that a recording medium of a different thickness is to be printed, a carrier (18), which has a first portion supporting the printhead (19) and pivotally and slidably mounted on a front guide rail (16), is moved so that a shift arm (34) on the carrier (18) engages a right side plate of the frame. This disconnects a ribbon drive motor gear from a ribbon drive gear and moves the ribbon drive motor gear into engagement with a gear (23) train. Rotation of the gear train rotates a gear, which has a threaded shaft and is rotatably supported by a second portion of the carrier slidably mounted on a rear guide rail, to cause pivoting of the first portion of the carrier about the front guide rail (16) to change the gap of the printhead from the platen. When the gap change is completed, the carrier is moved to the left to its recording medium loading printing position and to disengage the ribbon drive motor gear from the gear train and reengage it with the ribbon drive gear. Then, manual adjustment of the spacing of the printhead from the platen may be accomplished through handle 64 which controls rotation of gear 23 through shaft 61.
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公开(公告)号：DE68907111T2
公开(公告)日：1993-11-25
申请号：DE68907111
申请日：1989-02-28
Applicant: IBM
IPC: B41J25/304 , B41J25/308
Abstract: A printhead (19) is adjusted automatically or manually with respect to a platen (12) in accordance with the thickness of a recording medium. When a host data processor sends a control signal to the printer microprocessor to indicate that a recording medium of a different thickness is to be printed, a carrier (18), which has a first portion supporting the printhead (19) and pivotally and slidably mounted on a front guide rail (16), is moved so that a shift arm (34) on the carrier (18) engages a right side plate of the frame. This disconnects a ribbon drive motor gear from a ribbon drive gear and moves the ribbon drive motor gear into engagement with a gear (23) train. Rotation of the gear train rotates a gear, which has a threaded shaft and is rotatably supported by a second portion of the carrier slidably mounted on a rear guide rail, to cause pivoting of the first portion of the carrier about the front guide rail (16) to change the gap of the printhead from the platen. When the gap change is completed, the carrier is moved to the left to its recording medium loading printing position and to disengage the ribbon drive motor gear from the gear train and reengage it with the ribbon drive gear. Then, manual adjustment of the spacing of the printhead from the platen may be accomplished through handle 64 which controls rotation of gear 23 through shaft 61.
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公开(公告)号：AU539912B2
公开(公告)日：1984-10-25
申请号：AU6996281
申请日：1981-04-29
Applicant: IBM
Inventor： DENNY CLIFFORD MILLER , WAMPLER CHARLES WELDON
Abstract: Drive apparatus especially useful for controllably displacing the carrier of a printer, the drive apparatus including a lead screw (25) having laterally spaced apart and floating threaded followers (35, 36) thereon. Intermediate the threaded followers (35, 36) are a first pair of preloaded springs (50) which press the followers (35, 36) against the opposite flanks of the threads on the lead screw (25) to thereby inhibit backlash intermediate the followers (35, 36). A second pair of springs (70) are mounted intermediate a bracket (30), which is fastened to the carrier, and at least one of the followers for effecting coupling between the carrier and the follower while controlling backlash therebetween. A pair of arms (37a, 38a) extend from the followers (35, 36) and are coupled to a restraining shaft (100) in such a manner as to inhibit rotational movement of the arms (37, 38) (and thus the followers) while permitting motion of the followers in the direction parallel and perpendicular to the lead screw (25) to accommodate runnout or eccentricity.
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公开(公告)号：DE3167776D1
公开(公告)日：1985-01-31
申请号：DE3167776
申请日：1981-03-06
Applicant: IBM
Inventor： DENNY CLIFFORD MILLER , WAMPLER II CHARLES WELDON
Abstract: Drive apparatus especially useful for controllably displacing the carrier of a printer, the drive apparatus including a lead screw (25) having laterally spaced apart and floating threaded followers (35, 36) thereon. Intermediate the threaded followers (35, 36) are a first pair of preloaded springs (50) which press the followers (35, 36) against the opposite flanks of the threads on the lead screw (25) to thereby inhibit backlash intermediate the followers (35, 36). A second pair of springs (70) are mounted intermediate a bracket (30), which is fastened to the carrier, and at least one of the followers for effecting coupling between the carrier and the follower while controlling backlash therebetween. A pair of arms (37a, 38a) extend from the followers (35, 36) and are coupled to a restraining shaft (100) in such a manner as to inhibit rotational movement of the arms (37, 38) (and thus the followers) while permitting motion of the followers in the direction parallel and perpendicular to the lead screw (25) to accommodate runnout or eccentricity.
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