US3575506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copying apparatus
Assignee: Singer Co
•
Filing: 1968-10-21
•
Granted: 1971-04-20
•
Expires: 1988-10-21
Abstract
Abstract The various components necessary to provide electrostatic reproductions of originals are arranged in a manner such that the apparatus is dimensionally more compact. The photoconductive web moves in a substantially U-shaped path from a supply reel through a charging station, an exposure station, developer station and an image transfer station to a takeup reel. Similarly, the original sheets are moved in a U-shaped path and into contact with the photoconductive web while the copy sheets are fed individually in a similar U-shaped path coincident with the photoconductive web for transfer of the developed image.
Inventors
- 👤 Wilhelm Knechtel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:46
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/225
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
376 words
An electrophotographic printer comprising: a supply reel and a takeup reel; a web having a photosensitive surface and adapted to move in a looped path from said supply reel to said takeup reel; means for applying a charge to the photosensitive surface of said web; an exposure means disposed adjacent said charge applying means; a first paper feed means for moving an original sheet in a generally U-shaped path into contact with the photosensitive surface of said web for movement therewith and the formation of an electrostatic latent image of said original on said web by said exposure means; ejector means normally operable to continue the movement of the original sheet by said first paper feed means in the U-shaped path subsequent to the formation of a latent image on said web; a diverter means disposed between the legs of the U-shaped path of movement of an original sheet by said first paper feed means selectively operable to supersede the operation of said ejector means and enable repeated feeding of a single original by said first paper feed means; a developer means for applying powder to the electrostatic latent image on said web immediately subsequent to the operation of said first paper feed means; a second paper feed means for moving a copy sheet in a generally U-shaped path operable to engage said copy sheet with the developed image bearing surface of said web for movement therewith, one leg of the U-shaped path of the copy sheet being in a plane coincident with the looped path of said web; an image transfer means for effecting the transfer of the developed latent image from said web to said copy sheet upon operation of said secoNd paper feed means and the engagement of said copy sheet with the photosensitive surface of said web; a separating means forming the closed end portion of the Ushaped path of travel of the copy sheet effective during operation of said second paper feed means to separate the copy sheet from said web following operation of said image transfer means; and a fusing means disposed within the U-shaped path of travel of the copy sheet operable to fix the transferred image on the copy sheet subsequent to the operation of said separating means.
Claim 2
Dependent Claim
376 words
An electrophotographic printer comprising: a supply reel and a takeup reel; a web having a photosensitive surface and adapted to move in a looped path from said supply reel to said takeup reel; means for applying a charge to the photosensitive surface of said web; an exposure means disposed adjacent said charge applying means; a first paper feed means for moving an original sheet in a generally U-shaped path into contact with the photosensitive surface of said web for movement therewith and the formation of an electrostatic latent image of said original on said web by said exposure means; ejector means normally operable to continue the movement of the original sheet by said first paper feed means in the U-shaped path subsequent to the formation of a latent image on said web; a diverter means disposed between the legs of the U-shaped path of movement of an original sheet by said first paper feed means selectively operable to supersede the operation of said ejector means and enable repeated feeding of a single original by said first paper feed means; a developer means for applying powder to the electrostatic latent image on said web immediately subsequent to the operation of said first paper feed means; a second paper feed means for moving a copy sheet in a generally U-shaped path operable to engage said copy sheet with the developed image bearing surface of said web for movement therewith, one leg of the U-shaped path of the copy sheet being in a plane coincident with the looped path of said web; an image transfer means for effecting the transfer of the developed latent image from said web to said copy sheet upon operation of said secoNd paper feed means and the engagement of said copy sheet with the photosensitive surface of said web; a separating means forming the closed end portion of the Ushaped path of travel of the copy sheet effective during operation of said second paper feed means to separate the copy sheet from said web following operation of said image transfer means; and a fusing means disposed within the U-shaped path of travel of the copy sheet operable to fix the transferred image on the copy sheet subsequent to the operation of said separating means.
Claim 3
Dependent Claim
372 words
An electrophotographic printer comprising: a supply reel and a take up reel; a web having a photosensitive surface and adapted to move in a looped path from said supply reel to said takeup reel; means for applying a charge to the photosensitive surface of said web; an exposure means disposed adjacent said charge applying means; a first paper feed means for moving an original sheet in a generally U-shaped path into contact with the photosensitive surface of said web for movement therewith and the formation of an electrostatic latent image of said original on said web by said exposure means; ejector means normally operable to continue the movement of the original sheet by said first paper feed means in the U-shaped path subsequent to the formation of a latent image on said web; a developer powder reservoir disposed adjacent the image bearing surface of said web along the looped path thereof; a brush rotatable in the powder within said reservoir operable to dust the latent image bearing surface of said web; a counter-corona charging element associated with said rotatable brush disposed within the confines of the looped path of said web and adjacent the nonimage bearing surface of the web; a second paper feed means for moving a copy sheet in a generally U-shaped path operable to engage said copy sheet with the developed image bearing surface of said web for movement therewith, one leg of the U-shaped path of the copy sheet being in a plane coincident with the looped path of said web; an image transfer means for effecting the transfer of the developed latent image from said web to said copy sheet upon operation of said second paper feed means and the engagement of said copy sheet with the photosensitive surface of said web, a seperating means forming the closed end portion of the U-shaped path of travel of the copy sheet effective during operation of said second paper feed means to separate the copy sheet from said web following operation of said image transfer means; and a fusing means disposed within the U-shaped path of travel of the copy sheet operable to fix the transferred image of the copy sheet subsequent to the operation of said separating means.
Claim 4
Dependent Claim
372 words
An electrophotographic printer comprising: a supply reel and a take up reel; a web having a photosensitive surface and adapted to move in a looped path from said supply reel to said takeup reel; means for applying a charge to the photosensitive surface of said web; an exposure means disposed adjacent said charge applying means; a first paper feed means for moving an original sheet in a generally U-shaped path into contact with the photosensitive surface of said web for movement therewith and the formation of an electrostatic latent image of said original on said web by said exposure means; ejector means normally operable to continue the movement of the original sheet by said first paper feed means in the U-shaped path subsequent to the formation of a latent image on said web; a developer powder reservoir disposed adjacent the image bearing surface of said web along the looped path thereof; a brush rotatable in the powder within said reservoir operable to dust the latent image bearing surface of said web; a counter-corona charging element associated with said rotatable brush disposed within the confines of the looped path of said web and adjacent the nonimage bearing surface of the web; a second paper feed means for moving a copy sheet in a generally U-shaped path operable to engage said copy sheet with the developed image bearing surface of said web for movement therewith, one leg of the U-shaped path of the copy sheet being in a plane coincident with the looped path of said web; an image transfer means for effecting the transfer of the developed latent image from said web to said copy sheet upon operation of said second paper feed means and the engagement of said copy sheet with the photosensitive surface of said web, a seperating means forming the closed end portion of the U-shaped path of travel of the copy sheet effective during operation of said second paper feed means to separate the copy sheet from said web following operation of said image transfer means; and a fusing means disposed within the U-shaped path of travel of the copy sheet operable to fix the transferred image of the copy sheet subsequent to the operation of said separating means.
Claim 5
Dependent Claim
355 words
An electrophotographic printer comprising: a supply reel and a takeup reel; a web having a photosensitive surface and adapted to move in a looped path from said supply reel to said takeup reel; means for applying a charge to the photosensitive surface of said web; an exposure means disposed adjacent said charge applying means; a pair of coacting rollers rotatable at a speed equivalent to the linear speed to said web for moving an original sheet in a generally U-shaped path into contact with the photosensitive surface of said web; a feed roller forming the closed end of the U-shaped path of travel of the original sheet operable to move an original sheet with said web for reflex exposure by said exposure means forming an electrostatic latent image on the photosensitive surface of said web; ejector means normally operable to continue the movement of the original sheet in the U-shaped path subsequent to the formation of a latent image on said web; a developer means for applying powder to the electrostatic latent image on said web immediately subsequent to the operation of said ejector means; a paper feed means for moving a copy sheet in a genErally U-shaped path operable to engage said copy sheet with the developed image bearing surface of said web for movement therewith, one leg of the U-shaped path of the copy sheet being in a plane coincident with the looped path of said web; an image transfer means for effecting the transfer of the developed latent image from said web to said copy sheet upon operation of said paper feed means and the engagement of said copy sheet with the photosensitive surface of said web; a separating means forming the closed end portion of the U-shaped path of travel of the copy sheet effective during operation of said paper feed means to separate the copy sheet from said web following operation of said image transfer means; and a fusing means disposed within the U-shaped path of the travel of the copy sheet operable to fix the transferred image on the copy sheet subsequent to the operation of said separating means.
Claim 6
Dependent Claim
355 words
An electrophotographic printer comprising: a supply reel and a takeup reel; a web having a photosensitive surface and adapted to move in a looped path from said supply reel to said takeup reel; means for applying a charge to the photosensitive surface of said web; an exposure means disposed adjacent said charge applying means; a pair of coacting rollers rotatable at a speed equivalent to the linear speed to said web for moving an original sheet in a generally U-shaped path into contact with the photosensitive surface of said web; a feed roller forming the closed end of the U-shaped path of travel of the original sheet operable to move an original sheet with said web for reflex exposure by said exposure means forming an electrostatic latent image on the photosensitive surface of said web; ejector means normally operable to continue the movement of the original sheet in the U-shaped path subsequent to the formation of a latent image on said web; a developer means for applying powder to the electrostatic latent image on said web immediately subsequent to the operation of said ejector means; a paper feed means for moving a copy sheet in a genErally U-shaped path operable to engage said copy sheet with the developed image bearing surface of said web for movement therewith, one leg of the U-shaped path of the copy sheet being in a plane coincident with the looped path of said web; an image transfer means for effecting the transfer of the developed latent image from said web to said copy sheet upon operation of said paper feed means and the engagement of said copy sheet with the photosensitive surface of said web; a separating means forming the closed end portion of the U-shaped path of travel of the copy sheet effective during operation of said paper feed means to separate the copy sheet from said web following operation of said image transfer means; and a fusing means disposed within the U-shaped path of the travel of the copy sheet operable to fix the transferred image on the copy sheet subsequent to the operation of said separating means.
Claim 7
Dependent Claim
64 words
In the apparatus of claim 3 wherein said exposure means comprises a light source, and a reflector means for directing light from said light source onto said web for reflex imaging of an original sheet by said feed roller to form an electrostatic latent image on said web, said light source and said reflector means being disposed within the looped path of said web.
References Cited (Backward Citations)
US3093039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |