US3827801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic copier of image transfer type
Assignee: Minolta Co Ltd
•
Filing: 1973-03-07
•
Granted: 1974-08-06
•
Expires: 1993-03-07
Abstract
Abstract An image transfer type electrostatic copier includes a rectangular box open at one end and connected to a suction fan at its other end and has a pair of longitudinally spaced slits formed in a wide wall thereof which is separated by a removable wall section. A cleaner belt extends from a storage roll through one slit along the inside face of the box wall through the other slit to a take-up roll. A photosensitive web is sucked into the box and traverses a looped path which extends along the cleaner belt under the influence of the reduced pressure in the box. The web, is driven and charged, exposed to a scanned image, has toner applied and the toned image is transferred to copy paper.
Inventors
- 👤 T Fujiwara
- 👤 S Tanaka
- 👤 Y Enoguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:31
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G21/0041
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
185 words
An electrostatic copier of the image transfer type comprising a longitudinally extenDing suction box having an opening proximate one end thereof and a pair of longitudinally extending walls having internal faces, a cleaning belt including a section extending along one of said box internal faces and being removable therefrom, an elongated web having a photosensitive surface and traversing a loop path extending into said box and including a first longitudinal run along said cleaning belt and a second longitudinal run along the opposite internal face of said box and an end run joining the ends of said longitudinal runs within said box, suction means connected to the interior of said box remote from said opening for reducing the pressure within said box and for sucking a portion of said web into said box drive means for driving at least a portion of said web along the length thereof to travel through said box end opening, means for producing an image on said web photosensitive face during the movement of said web and means for transferring said image from said web to an image receiving substrate.
Claim 2
Dependent Claim
185 words
An electrostatic copier of the image transfer type comprising a longitudinally extenDing suction box having an opening proximate one end thereof and a pair of longitudinally extending walls having internal faces, a cleaning belt including a section extending along one of said box internal faces and being removable therefrom, an elongated web having a photosensitive surface and traversing a loop path extending into said box and including a first longitudinal run along said cleaning belt and a second longitudinal run along the opposite internal face of said box and an end run joining the ends of said longitudinal runs within said box, suction means connected to the interior of said box remote from said opening for reducing the pressure within said box and for sucking a portion of said web into said box drive means for driving at least a portion of said web along the length thereof to travel through said box end opening, means for producing an image on said web photosensitive face during the movement of said web and means for transferring said image from said web to an image receiving substrate.
Claim 3
Dependent Claim
51 words
The copier of claim 1 wherein one of said box walls has a pair of longitudinally spaced transverse slots formed therein, said cleaning belt extending through one of said slots into said box, along the internal face of said wall to the other slot and then outwardly through said other slot.
Claim 4
Dependent Claim
16 words
The copier of claim 2 wherein the portion of said wall between said slots is removable.
Claim 5
Dependent Claim
30 words
The copier of claim 2, including a belt take-up roll and a belt storage roll supported externally of said box, said cleaning belt extending between said rolls through said slots.
Claim 6
Dependent Claim
61 words
The copier of claim 1 wherein said image producing means comprises means for electrically charging said belt photosensitive surface, optical scanning means for projecting a light image of an original on said charged surface during the movement of said belt to produce a latent image and means for applying a toner powder to said latent image to produce a powder image.
Claim 7
Dependent Claim
118 words
The copier of claim 1 including a longitudinal partition dividing said suction box into first and second longitudinally extending compartments having openings at an end of said box remote from said suction means, said drive means including a drive roll longitudinally spaced from said end openings externally of said box, first means for retaining one end of said web proximate one of said end openings, second means for retaining the opposite end of said web proximate the other end of said end openings, said web traversing a looped path from said first retaining means in a first compartment then about said drive roller and a second looped path in the other compartment and to said second retaining means.
Claim 8
Dependent Claim
53 words
The copier of claim 1 wherein said drive means includes a drive roll located externally of said box and longitudinally spaced from said box end opening, one end of said web being engaged and driven by said drive roll and means for retaining the other end of said web proximate said end opening.
Claim 9
Dependent Claim
48 words
The copier of claim 1 wherein said drive means includes a drive roll located externally of said box and longitudinally spaced from said box end opening and said web comprises an endless belt extending around said drive roll and projecting into said suction box through said end opening.
Claim 10
Dependent Claim
21 words
The copier of claim 8 including a roll rotatably supported within said box, said extending about said roll within said box.
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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |