发明授权
- 专利标题: Actuation device for two typewriter functions
- 专利标题(中): 两个打字机功能的启动装置
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申请号: US252416申请日: 1981-04-09
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公开(公告)号: US4472073A公开(公告)日: 1984-09-18
- 发明人: Franco Valle , Pietro Musso
- 申请人: Franco Valle , Pietro Musso
- 申请人地址: ITX Ivrea
- 专利权人: Ing. C. Olivetti & C., S.p.A.
- 当前专利权人: Ing. C. Olivetti & C., S.p.A.
- 当前专利权人地址: ITX Ivrea
- 优先权: ITX67581A/80 19800415
- 主分类号: B41J29/36
- IPC分类号: B41J29/36 ; B41J29/26 ; B41J31/09 ; B41J32/00 ; B41J35/10 ; B41J35/20 ; B41J35/22 ; B41J35/23 ; B41J35/28 ; B41J5/30
摘要:
A cartridge for a typing ribbon and spools for a correcting ribbon are mounted on a common frame which can tilt about a spindle. In a lowered position of the frame the typing line behind a daisy wheel is visible. The frame is raised by a first stroke to the position shown to dispose the typing ribbon over the typing point on the platen. A longer stroke raises the correcting ribbon to the typing point and this longer stroke also actuates an automatic ratchet wheel and pawl type of feed mechanism for the correcting ribbon. The two strokes of the frame are controlled by a disc comprising two cam tracks with a common part and separate parts having different degrees of eccentricity relative to the common part. The grooved cam tracks are so shaped that a follower pin on an arm depending from the frame enters the radially inner track when the disc is rotated clockwise by a reversible electric motor, thereby to raise the frame by the smaller amount, whereas it enters the radially outer track in the case of anticlockwise rotation. The disc also carries a frontal cam which operates a ribbon feed mechanism for the ribbon in a container of the cartridge.
公开/授权文献
- US5445031A Pressure-measuring arrangement with high linearity 公开/授权日:1995-08-29