US 4,832,519 AGranted

Sheet setting device for printer and the like

AssigneeRicoh Company, Ltd.

InventorSakae Fujimoto

Life of this patent

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Abstract

A sheet setting device for a printer and the like including pressure rollers adapted to be brought into and out of engagement with a platen, and resist claws adapted to brought into and out of engagement with the platen in a position downstream of the position in which the pressure rollers are brought into and out of engagement with the platen. The device includes an operation lever and a linkage for linking the operation lever with the pressure rollers and the resist claws, the linkage being constructed such that as the operation lever is actuated, the resist claws are first brought into engagement with the platen and then the pressure rollers are moved away from the platen. By the aforesaid actuation of the operation lever, a lever having at its forward end paper ball rollers adapted to be brought into and out of engagement with the platen is moved through a cam in a manner to release the paper bail rollers from engagement with the platen. The aforesaid actuation of the operation lever is sensed by a switch which generates a signal for effecting control such that a carriage carrying a print head and a guide for guiding a sheet to conform to the outer peripheral surface of the platen is moved to a position suitable for guiding the sheet.

Claims5

Dependent claims

A printer comprising:

a platen (8),
a first motor (9) for driving said platen (8) to rotate,
a carriage (4) supporting a printing means (2) and a sheet guide means (3) which is movable along said platen (8),
a second motor (5) for driving said carriage (4) to move along said platen (8),
paper bail rollers (12) which are movable between a position in engagement with said platen (8) and a position out of engagement with said platen (8), wherein the improvement comprises:
a holding means (42) which holds said paper bail rollers (12) in the position out of engagement with said platen (8),
means, including a sensing means (32) which senses the movement of said paper bail rollers (12), for generating a first signal to actuate said second motor (5) such that said carriage (4) is moved to a predetermined position along the platen (8) and for generating a second signal to successively actuate said first motor (9) and said second motor (5) such that the platen (8) is rotated to lead a sheet in the direction of a position between the platen (8) and the paper bail rollers (12) guided with said sheet guide means (3) and then said carriage (4) is driven in reverse direction, said first signal being generated when said sensing means (32) senses that said paper bail rollers move to the position out of engagement with said platen (8) and said second signal being generated thereafter, and
means for releasing said paper bail rollers (12) from holding in said position out of engagement with said platen (8) by the rotation of the second motor (5) for driving said carriage (4) to move along said platen (8) in the reverse direction.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/107,925Filed 9 Oct 1987 · continuation
Priority: JP 56-11535324 Jul 1981
Granted: 23 May 1989
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

B41J 13/025
Rollers: special roller holding or lifting means, e.g. for temporarily raising one roller of a pair of nipping rollers for inserting printing material
B41J 13/036
Rollers: co-operating with a roller platen
B41J 13/042
Co-operating with a roller platen: front and rear rollers or sets of front or rear rollers each mounted on a separate carrier
B41J
Typewriters