US4951085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming apparatus
Assignee: Sharp Corp
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Filing: 1989-07-12
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Granted: 1990-08-21
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Expires: 2009-07-12
Abstract
Abstract An image forming apparatus with a media cartridge that accommodates a roll of a light receiving sheet, a leader sheet for automatic loading being connected to the leading edge of said light receiving sheet, wherein said apparatus comprises: sensitivity information recording means, provided on the leader sheet, for recording information relating to the sensitivity of the light receiving sheet for the formation of a full color image; a sensitivity information sensor to read the sensitivity information recorded on the sensitivity information recording means; and a color correcting means for correcting colors according to the sensitivity information read by the sensitivity information sensor.
Inventors
- 👤 Yoshiaki Ibuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:46
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/765; G03F; G03F7/00; G03F7/002; G03F7/0022; G03B; G03B2227/00; G03B2227/32; G03B2227/325
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
155 words
An image forming apparatus with a media cartridge that accommodates a roll of a light receiving sheet and that can be detached from the body of said apparatus, a leader sheet for automatic loading being connected to the leading edge of said light receiving sheet, wherein said apparatus comprises: a detecting means for detecting the attachment of said media cartridge to the body of said apparatus; sensitivity information recording means, provided on the leader sheet, for recording information relating to the sensitivity of the light receiving sheet for the formation of a full color image; a sensitivity information sensor to read the sensitivity information recorded on the sensitivity information recording means; a nonvolatile memory; a means for delivering sensitivity data read by said sensitivity information sensor into said nonvolatile memory; and a color correcting means for correcting colors of an image to be formed, in accordance with said sensitivity data stored in said nonvolatile memory.
Claim 2
Dependent Claim
155 words
An image forming apparatus with a media cartridge that accommodates a roll of a light receiving sheet and that can be detached from the body of said apparatus, a leader sheet for automatic loading being connected to the leading edge of said light receiving sheet, wherein said apparatus comprises: a detecting means for detecting the attachment of said media cartridge to the body of said apparatus; sensitivity information recording means, provided on the leader sheet, for recording information relating to the sensitivity of the light receiving sheet for the formation of a full color image; a sensitivity information sensor to read the sensitivity information recorded on the sensitivity information recording means; a nonvolatile memory; a means for delivering sensitivity data read by said sensitivity information sensor into said nonvolatile memory; and a color correcting means for correcting colors of an image to be formed, in accordance with said sensitivity data stored in said nonvolatile memory.
Claim 3
Dependent Claim
18 words
An image forming apparatus according to claim 1, wherein said leader sheet is made of a shading material.
Claim 4
Dependent Claim
42 words
An image forming apparatus according to claim 2, wherein said sensitivity information is given by punched holes or light transmitting holes that are formed in said leader sheet, said holes indicating the sensitivity values that are specific to said light receiving sheet.
Claim 5
Dependent Claim
25 words
An image forming apparatus according to claim 3, wherein said sensitivity information sensor is composed of a light emitting element and a light detecting element.
Claim 6
Dependent Claim
185 words
An image forming apparatus according to claim 3, wherein said color correcting means comprises first and second color correction filters that are movably disposed along a light path in a parallel manner to face each other, a movable diaphram that is disposed between said two color correction filters, fixed diaphrams that are disposed respectively outside of said color correction filters, and stepping motor means that are connected to said color correction filters so that said color correction filters are independently moved in the longitudinal direction, said first color filter being provided with a red light-absorbing filter on one edge, a colorless, transparent portion in the middle, and a green light-absorbing filter on the other edge, and said second color correction filter being provided with a green light-absorbing filter in one edge, a colorless, transparent portion in the middle, and a blue light-absorbing filter on the other edge, wherein by controlling said stepping motor means to move said two color correction filters, the insertion amount of these red, green and blue light-absorbing filters into said light path is changed to thereby carry out stepless color corrections.
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) | 1993-08-20 | 1994-02-19 | 1994-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-20 | 1998-02-19 | 1998-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-20 | 2002-02-19 | 2002-08-21 | $7700.00 | Window Closed / Lapsed |