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US 4,308,795 AGranted
Low energy impact printer
AssigneeNCR Corporation
InventorsDavid C. Wills, Raymond L. Lawter, Barry D. Briggs, Edward F. Sampson
Life of this patent
Estimating the term…
Abstract
The action of a rotatable cam assembly positions a plurality of type racks, enables printing and indexes paper prior to restoring the type racks to the home position. Teeth on the cam assembly engage teeth on the type racks for positioning thereof and an extended tooth on the cam assembly causes impact of the racks against a platen which is caused to be rotated by movement of the cam assembly to index the paper to the next print line.
Claims20
An impact printer comprising a
- platen member, a
- plurality of type character bearing members positionable in relation to said platen member for printing along a line of printing, a
- unitary member sequentially engageable with said type character bearing members and having a unitary member portion engageable with said bearing members for moving said bearing members from a home position into a printing position adjacent said platen member for enabling printing along said line of printing, said unitary member having another portion engageable with said type character bearing members for moving said bearing members toward and into contact with said platen member for printing, said unitary member being disengageable from said type character bearing members for permitting movement of said bearing members toward said home position, and
- means for moving said type character bearing members toward said home position from said printing position, said unitary member having a further portion engageable with said type character bearing members for repositioning said bearing members in said home position.
1 more element
In a printer, a
- platen rotatable for enabling advancement of record media therearound, a
- plurality of type character bearing members movable in relation to the platen, a
- rotatable member adjacent said type character bearing members and sequentially engageable therewith and having a rotatable member portion engageable with said bearing members for moving said bearing members from a non-printing position to a printing position adjacent said platen, said rotatable member having another portion engageable with said type character bearing members for moving said bearing members into contact with said record media and toward said platen for printing, said another portion of the rotatable member being engageable with said type character bearing members also for rotating said platen to advance said record media, said rotatable member being disengageable from said type character bearing members for permitting movement of said bearing members toward the non-printing position, and
- means for moving said type character bearing members toward said non-printing position, said rotatable member having a further portion engageable with said type character bearing members for repositioning said bearing members in said non-printing position.
1 more element
Dependencies are inferred from the claim text.