US3910395A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for print head retraction to facilitate paper insertion
Assignee: International Business Machines Corp
•
Filing: 1974-03-06
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Granted: 1975-10-07
•
Expires: 1994-03-06
Abstract
Abstract Print heads mounted on a carriage moveable parallel to the platen are automatically retracted away from the platen when the carriage reaches a home position to facilitate paper insertion and thereafter automatically move to the printing position as the carriage leaves the home position under a start command.
Inventors
- 👤 Donald F Colglazier
- 👤 Gordon W Westphal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:29
CPC Classifications
B; B41; B41J; B41J25/00; B41J25/001; B41J25/006; B41J2/00; B41J2/22; B41J2/23; B41J2/235
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
149 words
In a line printer having printing means mounted on a carriage moveable along a carriage path relative to the print line from a home position located at one extreme end of said carriage path to a return position located at another extreme end of said carriage path and back to the home position, said printing means being moveable relative to said carriage toward and away from said print line the improvement comprising: means normally holding said printing means in a print position relative to said print line, and means operable in response to said carriage coming into said home position for retracting said printing means away from said print line and holding said print means in the retracted position so long as said carriage remains in said home position and for restoring said printing means toward said print line when said carriage is moved away from said home position.
Claim 2
Dependent Claim
149 words
In a line printer having printing means mounted on a carriage moveable along a carriage path relative to the print line from a home position located at one extreme end of said carriage path to a return position located at another extreme end of said carriage path and back to the home position, said printing means being moveable relative to said carriage toward and away from said print line the improvement comprising: means normally holding said printing means in a print position relative to said print line, and means operable in response to said carriage coming into said home position for retracting said printing means away from said print line and holding said print means in the retracted position so long as said carriage remains in said home position and for restoring said printing means toward said print line when said carriage is moved away from said home position.
Claim 3
Dependent Claim
139 words
In a line printer having a carriage moveable along a carriage path relative to the print line from a home position located at one extreme end of said carriage path to a return position located at another extreme end of said carriage path and back to the home position, the improvement comprising: printing element support means moveably mounted to said carriage to move toward and away from said print line, actuator means for moving said support means toward and away from said print line, said actuator means normally holding said support means toward said print line, and operator means for operating said actuator means to move said support means away from said print line when said carriage is in said home position and to move said support means toward said print line when said carriage leaves said home position.
Claim 4
Dependent Claim
139 words
In a line printer having a carriage moveable along a carriage path relative to the print line from a home position located at one extreme end of said carriage path to a return position located at another extreme end of said carriage path and back to the home position, the improvement comprising: printing element support means moveably mounted to said carriage to move toward and away from said print line, actuator means for moving said support means toward and away from said print line, said actuator means normally holding said support means toward said print line, and operator means for operating said actuator means to move said support means away from said print line when said carriage is in said home position and to move said support means toward said print line when said carriage leaves said home position.
Claim 5
Dependent Claim
36 words
The line printer of claim 2 wherein said means for operating said actuator means causes said actuator means to hold said support means away from said print line while said carriage is in said home position.
Claim 6
Dependent Claim
18 words
The line printer of claim 2 wherein said actuator means is mounted on said carriage to move therewith.
Claim 7
Dependent Claim
17 words
The line printer of claim 2 wherein said operator means for operating said actuator means is stationary.
Claim 8
Dependent Claim
54 words
The line printer of claim 4 wherein said actuator means comprises a rotatable shaft journalled in said carriage, at least one eccentric mounted on said shaft in a position to bear upon said support means, and means carried by said shaft for engaging said operator means when said carriage moves into said home position.
Claim 9
Dependent Claim
24 words
The line printer of claim 6 wherein said means carried by said shaft is a cam follower pin projecting radially outward from said shaft.
Claim 10
Dependent Claim
24 words
The line printer of claim 5 wherein said operator means is a fixedly mounted cam having a hollow interior for receiving said actuator means.
Claim 11
Dependent Claim
21 words
The line printer of claim 8 wherein said cam has a pair of longitudinal helical grooves for receiving said actuator means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |