发明授权
- 专利标题: Print hammer damping mechanism for typewriters and like printing machines
- 专利标题(中): 打字机和打印机打印锤子阻尼机构
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申请号: US208788申请日: 1988-06-17
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公开(公告)号: US4900169A公开(公告)日: 1990-02-13
- 发明人: Remo Falconieri , Ester G. Gianotti
- 申请人: Remo Falconieri , Ester G. Gianotti
- 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: ITX67590A/85 19850628
- 主分类号: B41J9/42
- IPC分类号: B41J9/42
摘要:
The print apparatus comprises a character-carrying element of the `daisywheel` type with flexible spokes which can be selectively positioned in front of a platen roller, a print hammer for moving a selected character towards the platen roller, an actuating solenoid for the print hammer and a damping mechanism which acts on the hammer after the printing of each character. The hammer is directly connected to a movable armature of the solenoid and is returned by a return spring.During the return phase, the armature displaces, against a travel limiting stop, a counteracting weight which is urged towards an intermediate stop by the force of a counteracting spring. A first damping element is disposed between the movable armature and the counteracting weight and a second damping element is disposed between the weight and the travel limiting stop. The two damping elements, operating sequentially, minimize the time required for the hammer to settle down.
公开/授权文献
- US4402058A Keyboard mismatch correction 公开/授权日:1983-08-30