Title: Ribbon drive clutch

Abstract: A ribbon drive clutch comprises a stepper motor which has an output shaft on which there is mounted a clutch plate and a pair of cams. A plurality of pawls are each pivotally mounted on the clutch plate and are disposed to engage the first cam for rotation with the output shaft responsive to rotation of the output shaft in a first direction and disposed to engage the second cam for rotation with the output shaft responsive to rotation of the output shaft in a second direction. A first cam follower is disposed for operation of a ribbon drive linkage to drive a first ribbon responsive to rotation of the first cam and a second cam follower is disposed for operation of a ribbon drive linkage to drive a second ribbon responsive to rotation of the second cam.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Longrod, Scott J. (Woodbury, CT)

Application Number: 06/311224
Filing Date: 1981-10-14
Publication_date: 1984-03-13
Assignee: SCM CORP (US)

Primary Class(es): 192/43.100 192/48.920, 400/225, 400/697.100, 192/48.910, 4
Other Classes: B41J35/22; B41J33/50; F16D11/06
US Patent Ref:

2150227	March, 1939	Lake et al.	192/28
2972402	February, 1961	Howard	400/225	Ribbon feed mechanism
3367471	February, 1968	Berill	400/225	Typewriter with multiple ribbons
3384211	May, 1968	Placke et al.	192/28	Cycle control mechanism for business machines
4247210	January, 1981	Kacmarcik et al.	400/697.1	Ribbon feed and lift mechanism for a typewriter
4329072	May, 1982	Kacmarcik	400/225	Ribbon feed and lift mechanism for a typewriter
4347007	August, 1982	Schaefer	400/697.1	Typewriter cartridge and feed mechanism therefor

Other Refs: DE2708691DE1436757

July, 1941	192/43.1
September, 1973	400/214

Other References: Schaefer, "Two-Color Cartridge Ribbon System with Correction", vol. 22, No. 6, 11/79, IBM.

Primary Examiner: Bonck, Rodney H.
Assistant Examiner: House, David D.
Attorney: Greb, Kenneth W.
Weinberger, Ernest F.

Claims: