Paper insert and line feed mechanism
AssigneeInternational Business Machines Corporation
InventorIraj D. Shakib
Life of this patent
Estimating the term…
Abstract
A powered gear driven paper insert and line feed mechanism capable of rotating a platen through one half line spacing increments and which is both power operated and disconnectable for manual operation is disclosed. The platen of the typewriter or printer may be manually rotated using platen or may be electronically rotated by energizing the control magnet, thus engaging the clutch assembly to connect the drive motor to the platen. The clutching assembly is such that two separate clutches are operable to disconnect the platen and gear train from the overall clutch apparatus and also to disconnect the drive motor belt and other related hardware which is driven by the drive motor and belt.
Claims14
A motor driven indexing system for indexing a platen of a printer comprising:
- a motor having a continuous output;
- a platen;
- a first clutch engageable to transmit said motor output;
- a second clutch driven by said first clutch;
- a drive train;
- said second clutch engageable to transmit the said output of said motor transmitted by said first clutch to said second clutch to said drive train;
- said drive train drivingly engaged with said platen, whereby the engagement of said clutches connects drivingly said motor to said platen and disengagement of said clutches frees said motor from driving engagement with said platen and said platen from connection with said first clutch.
A motor driven gear drive for a printer platen comprising a gear drive train drivingly associated with said platen and a clutch assembly for disconnecting said motor from said platen, said clutch assembly comprising:
- a first clutch means for disconnecting said gear drive train from said clutch assembly for manual rotatability of the platen;
- a second clutch means for disconnecting said motor from said clutch assembly to permit the rotation of said motor while said clutches are in a disengaged condition.
A paper feed device for a typewriter comprising a clutching means, said clutching means comprising:
- a rotatable input ratchet;
- a rotatable output ratchet;
- an engageable dog assembly interconnectable between said ratchets for transmitting rotation of said input ratchet to said output ratchet,
- control means for controlling the engagement and disengagement of said dog assembly with said ratchets, whereby each of said ratchets may when disengaged rotate independently.
In a motor driven indexing system for indexing a platen of a printer, a motor, a drive train, a platen connected to said train, a first clutch means for disconnecting said motor from said drive train;
- a second clutch means operable simultaneously with said first clutch means for disconnecting said first clutch means from said drive train;
- said first and second clutch means comprising a common control means, whereby said platen may be freely rotated without rotating said common control means.
Dependencies are inferred from the claim text.