US4120594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Correction device for typewriters and the like
Assignee: Genicom Corp
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Filing: 1977-02-04
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Granted: 1978-10-17
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Expires: 1997-02-04
Abstract
Abstract A correction device for typewriters and the like, including a material, preferably in liquid form, maintained at a predetermined pressure within a container. The container outlet is coupled through a narrow elongated tube whose dispensing end is positioned upon the typewriter carriage or other device so as to be located immediately across from the last printed character or other symbol. An operating switch activates an electronic circuit for dispensing a measured amount of the material over the last printed character, the color of said material being the same as the paper being printed upon to provide the same effect as erasure of the character. The dispensing of the measured dosage may be accomplished either by electronic or mechanical means. The erasure means may be provided as an integral part of the typewriter unit or as an independent stand-alone accessory.
Inventors
- 👤 Robert Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:38
CPC Classifications
B; B41; B41J; B41J29/00; B41J29/26; B41J29/36
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
114 words
Apparatus for applying characters to a sheet of paper, including means for correcting errors, said apparatus including: supporting means comprising a platen for supporting a sheet of paper; printing means mounted for movement adjacent to said supporting means for selectively applying characters to said sheet of paper; a pressurized source of correction fluid; a hollow flexible tube having a first and a second end, said first end being connected to said source of pressurized correction fluid, said second end being mounted to move with said printing means to selectively apply said correction fluid to said sheet of paper; and coiling means responsive to movement of said printing means for coiling said hollow flexible tube.
Claim 2
Dependent Claim
114 words
Apparatus for applying characters to a sheet of paper, including means for correcting errors, said apparatus including: supporting means comprising a platen for supporting a sheet of paper; printing means mounted for movement adjacent to said supporting means for selectively applying characters to said sheet of paper; a pressurized source of correction fluid; a hollow flexible tube having a first and a second end, said first end being connected to said source of pressurized correction fluid, said second end being mounted to move with said printing means to selectively apply said correction fluid to said sheet of paper; and coiling means responsive to movement of said printing means for coiling said hollow flexible tube.
Claim 3
Dependent Claim
138 words
Apparatus for applying characters to a sheet of paper, including means for correcting errors, said apparatus including: supporting means comprising a platen for supporting a sheet of paper; printing means mounted for movement adjacent to said supporting means for selectively applying characters to said sheet of paper; a pressurized source of correction fluid; a hollow flexible tube having a first and a second end, said first end being connected to said source of pressurized correction fluid, said second end being mounted to move with said printing means to selectively apply said correction fluid to said sheet of paper; and wherein said hollow flexible tube is an elongated tube performed in an helical formed fashion and having a plastic memory suitable to enable said tube to return to the tightly helical coiled configuration when the expanded tube is released.
Claim 4
Dependent Claim
138 words
Apparatus for applying characters to a sheet of paper, including means for correcting errors, said apparatus including: supporting means comprising a platen for supporting a sheet of paper; printing means mounted for movement adjacent to said supporting means for selectively applying characters to said sheet of paper; a pressurized source of correction fluid; a hollow flexible tube having a first and a second end, said first end being connected to said source of pressurized correction fluid, said second end being mounted to move with said printing means to selectively apply said correction fluid to said sheet of paper; and wherein said hollow flexible tube is an elongated tube performed in an helical formed fashion and having a plastic memory suitable to enable said tube to return to the tightly helical coiled configuration when the expanded tube is released.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-16 | 1982-04-17 | 1982-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-16 | 1986-04-17 | 1986-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-16 | 1990-04-17 | 1990-10-17 | $7700.00 | Window Closed / Lapsed |