US3630335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing means with plural helical sets of type
Assignee: Singer Co
•
Filing: 1970-07-22
•
Granted: 1971-12-28
•
Expires: 1990-07-22
Abstract
Abstract A font wheel having a plurality of character types arranged in predetermined groups of helixlike patterns is mounted for continuous rotation about its axis and for continuous translation along its axis adjacent a sheet of paper on which selected characters are to be printed in a row along the axial direction of translation. A print hammer disposed behind the paper travels axially with the font wheel and is driven toward the paper and font wheel at selective times to cause printing of selected characters in response to input data and font wheel position signals. Horizontal spacing between adjacent printed characters is dependent upon groups of character types included in the selected character to be printed.
Inventors
- 👤 Leland D Chamness
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:26
CPC Classifications
B; B41; B41J; B41J1/00; B41J1/22; B41J1/32; B41J1/34; Y; Y10; Y10S; Y10S400/00; Y10S400/901
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
361 words
In combination: a cylindrical member having a substantially circular peripheral surface, said member being rotatable about the body axis of said cylinder; a first set of character types disposed on said peripheral surface in a first pattern defined with respect to said axis by one-half turn of a first helix about said axis; a second set of character types disposed on said peripheral surface in a second pattern defined with respect to said axis by one-half turn of a second helix about said axis; said first pattern having a first end disposed at a first circumferential location and a first axial location with respect to the axis of rotation of said member, said first pattern having a second end disposed at a second circumferential location and a second axial location with respect to the axis of rotation of said member, said first and second circumferential locations of said first end and said second end, respectively, being circumferentially spaced from each other by about one-half turn about the axis of rotation of said member; said second pattern having a first end disposed at a first circumferential location and a first axial location with respect to the axis of rotation of said member different from said first end of said first pattern, said second pattern having a second end disposed at a second circumferential location and a second axial location with respect to the axis of rotation of said member, said first and second circumferential locations of said first end and said second end, respectively, of said second pattern being circumferentially spaced from each other by about one-half turn about the axis of rotation of said member; said first ends of said first and second patterns being circumferentially spaced from each other by about one-half turn about the axis of rotation of said member; said second ends of said first and second patterns being circumferentially spaced from each other by about one-half turn about the axis of rotation of said member; said first end and said second end of both said first pattern and said second pattern being axially spaced from each other with respect to the axis of rotation of said member.
Claim 2
Dependent Claim
361 words
In combination: a cylindrical member having a substantially circular peripheral surface, said member being rotatable about the body axis of said cylinder; a first set of character types disposed on said peripheral surface in a first pattern defined with respect to said axis by one-half turn of a first helix about said axis; a second set of character types disposed on said peripheral surface in a second pattern defined with respect to said axis by one-half turn of a second helix about said axis; said first pattern having a first end disposed at a first circumferential location and a first axial location with respect to the axis of rotation of said member, said first pattern having a second end disposed at a second circumferential location and a second axial location with respect to the axis of rotation of said member, said first and second circumferential locations of said first end and said second end, respectively, being circumferentially spaced from each other by about one-half turn about the axis of rotation of said member; said second pattern having a first end disposed at a first circumferential location and a first axial location with respect to the axis of rotation of said member different from said first end of said first pattern, said second pattern having a second end disposed at a second circumferential location and a second axial location with respect to the axis of rotation of said member, said first and second circumferential locations of said first end and said second end, respectively, of said second pattern being circumferentially spaced from each other by about one-half turn about the axis of rotation of said member; said first ends of said first and second patterns being circumferentially spaced from each other by about one-half turn about the axis of rotation of said member; said second ends of said first and second patterns being circumferentially spaced from each other by about one-half turn about the axis of rotation of said member; said first end and said second end of both said first pattern and said second pattern being axially spaced from each other with respect to the axis of rotation of said member.
Claim 3
Dependent Claim
17 words
The combination according to claim 1 wherein each of said helix patterns have the same helix angle.
Claim 4
Dependent Claim
100 words
An apparatus for printing characters on the surface of a sheet of paper, said apparatus comprising the combination of claim 1 and further including; means for continuously rotating said member about said axis; said axis being substantially parallel with the surface of the paper to be printed; means for moving said member in a path of travel along said axis while said member is rotated about said axis; means for urging said paper and selective ones of said character types into printing engagement with each other while said member is being rotated about said axis and moved along said axis.
Claim 5
Dependent Claim
44 words
The apparatus according to claim 3 wherein said first set of character types include types indicative of the numerals 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9; and wherein said second set of character types include types indicative of alphabetic characters.
Claim 6
Dependent Claim
89 words
The apparatus according to claim 3 wherein said means for moving said member along said axis includes; a screw means having a helical groove provided therein, said helical groove having a predetermined sense; means for rotating said screw member in synchronism with rotation of said member according to a predetermined ratio; and means extending between said member and said screw means for releasable engagement with said screw means, said releasable engagement means moving said member in a first direction along said axis when in engagement with said screw means.
Claim 7
Dependent Claim
32 words
The apparatus according to claim 5 wherein said first and second helix patterns have the same predetermined sense, opposite to the sense of said predetermined sense of said helical screw means groove.
Claim 8
Dependent Claim
26 words
The apparatus according to claim 5 wherein said first helix pattern, said second helix pattern, and said screw means groove have the same acute helix angle.
References Cited (Backward Citations)
US2843243A
Cited
US2926602A
Cited
US3331316A
Cited
US3406625A
Cited
US3356199A
Cited
US3424291A
Cited
US3442364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |