Patent US4427286A successfully refreshed from Google Patents.
US4427286A
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Electrophotocopier line scanning illuminator
Assignee: Pitney Bowes Inc
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Filing: 1982-07-12
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Granted: 1984-01-24
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Expires: 2002-07-12
Abstract
Abstract A line scanning, illuminating apparatus for use in an electrophotocopying machine. The apparatus includes a linear source of light, a hyperbolic reflector situated behind the linear light source, and a cylindrical lens located in front of the linear light source. The profile of the reflector is given by the equation: ##EQU1## wherein the x and y axes intersect at the center line of the reflector, and wherein B is a positive quantity on the x axis representing the distance between the center line of the reflector and a virtual image of the light source created behind the reflector, and wherein A is a negative quantity representing the distance between the center line of the reflector and the linear light source located in front of the reflector.
Inventors
- 👤 Thomas W. Bosse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:55
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/54; G03B27/542
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
108 words
A line scanning, illuminating apparatus, for use in an electrophotocopying machine, comprising: a linear source of light; a hyperbolic reflector situated behind the linear light source, the profile of the reflector being given by the equation: ##EQU4## B=a point on the x axis and represents the distance between the center line of said reflector and a virtual image of the light source created behind said reflector, and is a positive quantity, and A=a negative quantity representing the distance between the center line of said reflector and the linear light source located in front of said reflector; and a cylindrical lens located in front of said linear light source.
Claim 2
Dependent Claim
108 words
A line scanning, illuminating apparatus, for use in an electrophotocopying machine, comprising: a linear source of light; a hyperbolic reflector situated behind the linear light source, the profile of the reflector being given by the equation: ##EQU4## B=a point on the x axis and represents the distance between the center line of said reflector and a virtual image of the light source created behind said reflector, and is a positive quantity, and A=a negative quantity representing the distance between the center line of said reflector and the linear light source located in front of said reflector; and a cylindrical lens located in front of said linear light source.
Claim 3
Dependent Claim
107 words
An electrophotocopying machine having a line scanning, illuminating apparatus therein, comprising: a linear source of light; a hyperbolic reflector situated behind the linear light source, the profile of the reflector being given by the equation: ##EQU5## B=a point on the x axis and represents the distance between the center line of said reflector and a virtual image of the light source created behind said reflector, and is a positive quantity, and A=a negative quantity representing the distance between the center line of said reflector and the linear light source located in front of said reflector; and a cylindrical lens located in front of said linear light source.
Claim 4
Dependent Claim
107 words
An electrophotocopying machine having a line scanning, illuminating apparatus therein, comprising: a linear source of light; a hyperbolic reflector situated behind the linear light source, the profile of the reflector being given by the equation: ##EQU5## B=a point on the x axis and represents the distance between the center line of said reflector and a virtual image of the light source created behind said reflector, and is a positive quantity, and A=a negative quantity representing the distance between the center line of said reflector and the linear light source located in front of said reflector; and a cylindrical lens located in front of said linear light source.
Claim 5
Dependent Claim
11 words
The electrophotocopying machine of claim 2, further comprising a reciprocating carriage.
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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) | 1987-01-23 | 1987-07-25 | 1988-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-23 | 1991-07-25 | 1992-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-23 | 1995-07-25 | 1996-01-24 | $7700.00 | Window Closed / Lapsed |