US3908809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed printer
Assignee: International Business Machines Corp
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Filing: 1974-12-30
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Granted: 1975-09-30
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Expires: 1994-12-30
Abstract
Abstract A technique and apparatus for increasing the speed of a printer through the elimination of lag times and the full utilization of a continuously rotating disc-like print element is disclosed. The apparatus includes a continuous drive for translating the print carrier along the print line of a printer while superimposing upon this uniform constant velocity drive a second drive force and velocity from a second drive member to cause the carrier to either be accelerated or retarded to properly position a character independent of the amount of time required to bring the next succeeding character into print position.
Inventors
- 👤 Horace S Beattie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:42
CPC Classifications
B; B41; B41J; B41J19/00; B41J19/18; B41J19/20; B41J1/00; B41J1/22; B41J1/24; B41J7/00; B41J7/36; B41J7/42; B41J7/44; Y; Y10; Y10S; Y10S400/00; Y10S400/901
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
119 words
A character-by-character printer having a type element positionable to present different characters to a print position wherein the time required to present successive characters varies in dependence upon particular succession of characters desired, and means supporting said type element and paper holding means for relative lateral displacement of said print position along a writing line, wherein the improvement comprises: first means providing a source of continuous motion operatively connected to move said print position in the letter feed direction; second means operative to superimpose variable incremental motion onto said continuous motion, and control means for operating said incremental motion means as a function of the selection time between a character just printed and the subsequent character to be printed.
Claim 2
Dependent Claim
119 words
A character-by-character printer having a type element positionable to present different characters to a print position wherein the time required to present successive characters varies in dependence upon particular succession of characters desired, and means supporting said type element and paper holding means for relative lateral displacement of said print position along a writing line, wherein the improvement comprises: first means providing a source of continuous motion operatively connected to move said print position in the letter feed direction; second means operative to superimpose variable incremental motion onto said continuous motion, and control means for operating said incremental motion means as a function of the selection time between a character just printed and the subsequent character to be printed.
Claim 3
Dependent Claim
40 words
The printer of claim 1 wherein said first and said second means operate in timed relation to each other to position said print position at the desired point at the time and desired characters are presented to said print position.
Claim 4
Dependent Claim
24 words
The printer of claim 1 wherein said selection time is reduced by said type element comprising at least a partially duplicated set of characters.
Claim 5
Dependent Claim
12 words
The printer of claim 1 wherein said type element is continuously moving.
Claim 6
Dependent Claim
31 words
The printer of claim 1 wherein said first means comprises a constant velocity drive motor operatively connected to move said print point at a constant velocity in the letter feed direction.
Claim 7
Dependent Claim
19 words
The printer of claim 5 wherein said type element is carried by a carrier moveable along said print line.
Claim 8
Dependent Claim
13 words
The printer of claim 6 wherein said operative connection is a cable means.
Claim 9
Dependent Claim
17 words
The printer of claim 6 wherein said operative connection is a lead screw and nut drive means.
Claim 10
Dependent Claim
35 words
The printer of claim 8 wherein said nut of said drive means is rotationally supported on said carrier and said second means comprising a stepper motor driveably connected to said nut for rotating said nut.
Claim 11
Dependent Claim
24 words
The printer of claim 5 wherein said second means comprises a controllable stepper motor connected to said operative connection to superimpose said incremental motion.
Claim 12
Dependent Claim
13 words
The printer of claim 10 wherein said operative connection is a cable means.
Claim 13
Dependent Claim
24 words
The printer of claim 11 wherein said stepper motor connection comprises a drive drum and cable wrapped thereon, said cable comprising said operative connections.
Claim 14
Dependent Claim
132 words
A character-by-character printer having a type element positionable to present different characters to a print position wherein the time required to present successive characters varies in dependence upon particular succession of characters desired, and means supporting said type element and paper holding means for relative lateral displacement of said print position along a writing line, and means for impacting said type element onto said paper handling means, wherein the improvement comprises: first means providing a source of continuous motion operatively connected to move said print position in the letter feed direction; second means operative to superimposed variable incremental motion onto said continuous motion, and control means for operating said incremental motion means to cause said support means to arrive at said print position when a preselected character is at said print position.
Claim 15
Dependent Claim
132 words
A character-by-character printer having a type element positionable to present different characters to a print position wherein the time required to present successive characters varies in dependence upon particular succession of characters desired, and means supporting said type element and paper holding means for relative lateral displacement of said print position along a writing line, and means for impacting said type element onto said paper handling means, wherein the improvement comprises: first means providing a source of continuous motion operatively connected to move said print position in the letter feed direction; second means operative to superimposed variable incremental motion onto said continuous motion, and control means for operating said incremental motion means to cause said support means to arrive at said print position when a preselected character is at said print position.
Claim 16
Dependent Claim
24 words
The printer of claim 13 wherein said selection time is reduced by said type element comprising at least a partially duplicated set of characters.
Claim 17
Dependent Claim
31 words
The printer of claim 13 wherein said first means comprises a constant velocity drive motor operatively connected to move said print point at a constant velocity in the letter feed direction.
Claim 18
Dependent Claim
19 words
The printer of claim 15 wherein said type element is carried by a carrier moveable along said print line.
Claim 19
Dependent Claim
17 words
The printer of claim 16 wherein said operative connection is a lead screw and nut drive means.
Claim 20
Dependent Claim
35 words
The printer of claim 17 wherein said nut of said drive means is rotationally supported on said carrier and said second means comprising a stepper motor driveably connected to said nut for rotating said nut.
Claim 21
Dependent Claim
24 words
The printer of claim 15 wherein said second means comprises a controllable stepper motor connected to said operative connection to superimpose said incremental motion.
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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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |