Patent US4980723A successfully refreshed from Google Patents.
US4980723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Horizontal image shift by shifting to a slower copying rate
Assignee: Xerox Corp
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Filing: 1989-11-17
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Granted: 1990-12-25
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Expires: 2009-11-17
Abstract
Abstract An electrophotographic printing machine in which successive electrostatic latent images are recorded on a moving photoconductive belt. Each latent image is adapted to be recorded in a designated region on the photoconductive belt. The designated regions are separated from one another by an inter-image zone. A test patch is recorded in the inter-image zone. The number of designated regions on the photoconductive belt is adjusted so that the size of the inter-image zone is increased enabling a portion of the latent image to be recorded in the inter-image zone without overlapping any portion of the test patch.
Inventors
- 👤 Mark H. Buddendeck
- 👤 John W. Daughton
- 👤 John C. DeMott
- 👤 Robert M. Harwood
- 👤 Gary L. Hutchinson
- 👤 Khalid M. Rabb
- 👤 Robert L. Sklut
- 👤 Irwin Wagman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:30
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/50; G03G15/5033; G03G15/5041; G03G15/65; G03G15/6588; G03G15/6594; G03G2215/00; G03G2215/00025; G03G2215/00029; G03G2215/00033; G03G2215/00037; G03G2215/00042; G03G2215/00071; G03G2215/00075; G03G2215/0008; G03G2215/00362; G03G2215/00443; G03G2215/00523
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
210 words
A printing machine of the type in which successive latent images are recorded on a moving photoconductive belt, including: means for recording each latent image in a designated region on the receiving member, said recording means comprises means for charging said photoconductive belt, means for supporting an original document and means for exposing the original document being supported on said supporting means and selectively discharging the charge on the photoconductive belt to record a latent image thereon; means for adjusting the number of designated regions on the photoconductive belt so that said recording means can record a portion of the latent image in a zone between successive designated regions, said adjusting means decreases the number of designated regions on the receiving member of increase the size of the zone between successive designated regions; and means, coupled to said recording means, for positioning the latent image recorded on said receiving member relative to the designated region, said positioning means includes means, coupled to said exposure means, for controlling the timing of the exposure of the original document to the shift location of the latent image recorded on the photoconductive belt relative to the designated region so that a portion of the latent image extends into the zone between successive designated regions.
Claim 2
Dependent Claim
210 words
A printing machine of the type in which successive latent images are recorded on a moving photoconductive belt, including: means for recording each latent image in a designated region on the receiving member, said recording means comprises means for charging said photoconductive belt, means for supporting an original document and means for exposing the original document being supported on said supporting means and selectively discharging the charge on the photoconductive belt to record a latent image thereon; means for adjusting the number of designated regions on the photoconductive belt so that said recording means can record a portion of the latent image in a zone between successive designated regions, said adjusting means decreases the number of designated regions on the receiving member of increase the size of the zone between successive designated regions; and means, coupled to said recording means, for positioning the latent image recorded on said receiving member relative to the designated region, said positioning means includes means, coupled to said exposure means, for controlling the timing of the exposure of the original document to the shift location of the latent image recorded on the photoconductive belt relative to the designated region so that a portion of the latent image extends into the zone between successive designated regions.
Claim 3
Dependent Claim
38 words
A printing machine according to claim 1, wherein said controlling means advances exposure of the original document to shift the location of the latent image recorded on the photoconductive belt relative to the designated region in one direction.
Claim 4
Dependent Claim
39 words
A printing machine according to claim 2, wherein said controlling means delays exposure of the original document to shift the location of the latent image recorded on the photoconductive belt relative to the designated region in the opposite direction.
Claim 5
Dependent Claim
37 words
A printing machine according to claim 1, further including operator actuatable means, coupled to said controlling means, for selecting the magnitude of shift of the latent image recorded on the photoconductive belt relative to the designated region.
Claim 6
Dependent Claim
239 words
An electrophotographic printing machine of the type in which successive electrostatic latent images are recorded on a moving photoconductive belt, including: means for recording each latent image in a designated region on the photoconductive belt with each designated region being spaced from one another by an inter-image zone, said recording means includes means for charging said photoconductive belt, means for supporting an original document, and means for exposing the original document being supported on said supporting means and selectively discharging the charge on the photoconductive belt to record the latent image thereon; means for recording a test patch in the inter-image zone; means for adjusting the number of designated regions on the photoconductive belt so that said recording means can record a portion of the latent image in the inter-image zone without overlapping any portion of the test patch recorded therein, said adjusting means decreases the number of designated regions on the photoconductive belt to increase the size of the inter-image zone; and means, coupled to said recording means, for positioning the latent image recorded on said receiving member relative to the designated region, said positioning means includes means, coupled to said exposure means, for controlling the timing of the exposure of the original document to shift the location of the latent image recorded on the photoconductive belt relative to the designated region so that a portion of the latent image extends into the zone between successive designated regions.
Claim 7
Dependent Claim
239 words
An electrophotographic printing machine of the type in which successive electrostatic latent images are recorded on a moving photoconductive belt, including: means for recording each latent image in a designated region on the photoconductive belt with each designated region being spaced from one another by an inter-image zone, said recording means includes means for charging said photoconductive belt, means for supporting an original document, and means for exposing the original document being supported on said supporting means and selectively discharging the charge on the photoconductive belt to record the latent image thereon; means for recording a test patch in the inter-image zone; means for adjusting the number of designated regions on the photoconductive belt so that said recording means can record a portion of the latent image in the inter-image zone without overlapping any portion of the test patch recorded therein, said adjusting means decreases the number of designated regions on the photoconductive belt to increase the size of the inter-image zone; and means, coupled to said recording means, for positioning the latent image recorded on said receiving member relative to the designated region, said positioning means includes means, coupled to said exposure means, for controlling the timing of the exposure of the original document to shift the location of the latent image recorded on the photoconductive belt relative to the designated region so that a portion of the latent image extends into the zone between successive designated regions.
Claim 8
Dependent Claim
38 words
A printing machine according to claim 5, wherein said controlling means advances exposure of the original document to shift the location of the latent image recorded on the photoconductive belt relative to the designated region in one direction.
Claim 9
Dependent Claim
39 words
A printing machine according to claim 6, wherein said controlling means delays exposure of the original document to shift the location of the latent image recorded on the photoconductive belt relative to the designated region in the opposite direction.
Claim 10
Dependent Claim
37 words
A printing machine according to claim 5, further including operator actuatable means, coupled to said controlling means, for selecting the magnitude of shift of the latent image recorded on the photoconductive belt relative to the designated region.
Claim 11
Dependent Claim
160 words
A printing machine of the type in which successive latent images are recorded on a moving photoconductive member, including: means for recording each latent image in a designated region on the photoconductive member, said recording means comprising means for charging said photoconductive member, means for supporting an original document, and means for exposing the original document being supported on said supporting means and selectively discharging the charge on the photoconductive member to record a latent image thereon; means for adjusting the number of designated regions on the photoconductive member so that recording means can record a portion of the latent image in a zone between successive designated regions; and means, coupled to said exposure means, for controlling the timing of the exposure of the original document to shift the location of the latent image recorded on the photoconductive member relative to the designated region so that a portion of the latent image extends into the zone between successive designated regions.
Claim 12
Dependent Claim
160 words
A printing machine of the type in which successive latent images are recorded on a moving photoconductive member, including: means for recording each latent image in a designated region on the photoconductive member, said recording means comprising means for charging said photoconductive member, means for supporting an original document, and means for exposing the original document being supported on said supporting means and selectively discharging the charge on the photoconductive member to record a latent image thereon; means for adjusting the number of designated regions on the photoconductive member so that recording means can record a portion of the latent image in a zone between successive designated regions; and means, coupled to said exposure means, for controlling the timing of the exposure of the original document to shift the location of the latent image recorded on the photoconductive member relative to the designated region so that a portion of the latent image extends into the zone between successive designated regions.
Claim 13
Dependent Claim
193 words
An electrophotographic printing machine of the type in which successive electrostatic latent images are recorded on a moving photoconductive belt, including: means for recording each latent image in a designated region on the photoconductive belt with each designated region being spaced from one another by an inter-image zone, said recording means includes means for charging said photoconductive belt, means for supporting an original document, and means for exposing the original document being supported on said supporting means and selectively discharging the charge on the photoconductive belt to record the latent image thereon; means for recording a test patch in the inter-image zone; means for adjusting the number of designated regions on the photoconductive belt so that said recording means can record a portion of the latent image in the inter-image zone without overlapping any portion of the test patch recorded therein; and means, coupled to said exposure means, for controlling the timing of the exposure of the original document to shift the location of the latent image recorded on the photoconductive belt relative to the designated region so that a portion of the latent image extends into the zone between successive designated regions.
Claim 14
Dependent Claim
193 words
An electrophotographic printing machine of the type in which successive electrostatic latent images are recorded on a moving photoconductive belt, including: means for recording each latent image in a designated region on the photoconductive belt with each designated region being spaced from one another by an inter-image zone, said recording means includes means for charging said photoconductive belt, means for supporting an original document, and means for exposing the original document being supported on said supporting means and selectively discharging the charge on the photoconductive belt to record the latent image thereon; means for recording a test patch in the inter-image zone; means for adjusting the number of designated regions on the photoconductive belt so that said recording means can record a portion of the latent image in the inter-image zone without overlapping any portion of the test patch recorded therein; and means, coupled to said exposure means, for controlling the timing of the exposure of the original document to shift the location of the latent image recorded on the photoconductive belt relative to the designated region so that a portion of the latent image extends into the zone between successive designated regions.
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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) | 1993-12-24 | 1994-06-25 | 1994-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-24 | 1998-06-25 | 1998-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-24 | 2002-06-25 | 2002-12-25 | $7700.00 | Window Closed / Lapsed |