| 摘要 |
1527505 Selective printing LRC Inc 25 Nov 1975 [27 Nov 1974] 48306/75 Heading B6F In a printer the unidirectional rotation of driving member 18 produces both the reciprocating movement of a print head carriage 31 (e.g. by helical path 29 and follower 30) and indexing of a record medium advancing roller 40 (e.g. using pawl 64 and ratchet 63). |
