US3898425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fusing apparatus
Assignee: Xerox Corp
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Filing: 1974-06-27
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Granted: 1975-08-05
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Expires: 1994-06-27
Abstract
Abstract An apparatus in which a powder pattern deposited on a sheet is affixed permanently thereto. The powder pattern deposited on one surface of the sheet is heated as it moves through a passageway in the apparatus from a receiving station to a delivery station. Fins minimize surface contact of the sheet to prevent scorching thereof. The foregoing abstract is neither intended to define the invention disclosed in the specification, nor is it intended to be limiting as to the scope of the invention in any way.
Inventors
- 👤 Melvin G Crandell
- 👤 Thomas J Scudder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:54
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2007
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
149 words
An apparatus having a sheet passageway therethrough for affixing permanently a powder pattern to a sheet including: means for transporting the sheet with the powder pattern deposited on one surface thereof along a path of movement through the passageway from a sheet receiving station to a sheet delivery station; means for heating the powder pattern deposited on the sheet, said heating means being closely adjacent to and spaced from the surface of the sheet having the powder pattern deposited thereon; and insulating means operatively associated with said transporting means, said insulating means having a plurality of spaced fins extending transversely to the path of movement of the sheet and arranged to contact the other surface of the sheet as said transporting means advances the sheet from the receiving station to the delivery station, said heating means being substantially opposed from said insulating means with the sheet passageway interposed therebetween.
Claim 2
Independent Claim
149 words
An apparatus having a sheet passageway therethrough for affixing permanently a powder pattern to a sheet including: means for transporting the sheet with the powder pattern deposited on one surface thereof along a path of movement through the passageway from a sheet receiving station to a sheet delivery station; means for heating the powder pattern deposited on the sheet, said heating means being closely adjacent to and spaced from the surface of the sheet having the powder pattern deposited thereon; and insulating means operatively associated with said transporting means, said insulating means having a plurality of spaced fins extending transversely to the path of movement of the sheet and arranged to contact the other surface of the sheet as said transporting means advances the sheet from the receiving station to the delivery station, said heating means being substantially opposed from said insulating means with the sheet passageway interposed therebetween.
Claim 3
Dependent Claim
34 words
An apparatus as recited in claim 1, wherein said heating means includes a radiant energy source arranged to be in thermal communication with the sheet for supplying the energy output thereof onto the sheet.
Claim 4
Independent Claim
159 words
An apparatus having a sheet passageway therethrough for affixing permanently a powder pattern to a sheet including: means for transporting the sheet with the powder pattern deposited on one surface thereof along a path of movement through the passageway from a sheet receiving station to a sheet delivery station; a radiant energy source arranged to be in thermal communication with said sheet for supplying the energy output thereof onto the sheet, said radiant energy source comprising a plate member, a plurality of tubular heating elements secured to said plate member with the longitudinal axis thereof substantially parallel to one another, and means for energizing said heating elements; and insulating means operatively associated with said transporting means, said insulating means having a plurality of fins extending transversely to the path of movement of the sheet and arranged to contact the other surface of the sheet as said transporting means advances the sheet from the receiving station to the delivery station.
Claim 5
Independent Claim
159 words
An apparatus having a sheet passageway therethrough for affixing permanently a powder pattern to a sheet including: means for transporting the sheet with the powder pattern deposited on one surface thereof along a path of movement through the passageway from a sheet receiving station to a sheet delivery station; a radiant energy source arranged to be in thermal communication with said sheet for supplying the energy output thereof onto the sheet, said radiant energy source comprising a plate member, a plurality of tubular heating elements secured to said plate member with the longitudinal axis thereof substantially parallel to one another, and means for energizing said heating elements; and insulating means operatively associated with said transporting means, said insulating means having a plurality of fins extending transversely to the path of movement of the sheet and arranged to contact the other surface of the sheet as said transporting means advances the sheet from the receiving station to the delivery station.
Claim 6
Independent Claim
168 words
An apparatus having a sheet passageway therethrough for affixing permanently a powder pattern to a sheet including: means for transporting the sheet with the powder pattern deposited on one surface thereof along a path of movement through the passageway from a sheet receiving station to a sheet delivery station, said transporting means comprising an endless conveyor, means for driving said conveyor, and at least one sheet gripper secured to said conveyor for moving the sheet from the sheet receiving station to the sheet delivery station; means for heating the powder pattern deposited on the sheet, said heating means being closely adjacent to and spaced from the surface of the sheet having the powder pattern deposited thereon; and insulating means operatively associated with said transporting means, said insulating means having a plurality of fins extending transversely to the path of movement of the sheet and arranged to contact the other surface of the sheet as said transporting means advances the sheet from the receiving station to the delivery station.
Claim 7
Independent Claim
168 words
An apparatus having a sheet passageway therethrough for affixing permanently a powder pattern to a sheet including: means for transporting the sheet with the powder pattern deposited on one surface thereof along a path of movement through the passageway from a sheet receiving station to a sheet delivery station, said transporting means comprising an endless conveyor, means for driving said conveyor, and at least one sheet gripper secured to said conveyor for moving the sheet from the sheet receiving station to the sheet delivery station; means for heating the powder pattern deposited on the sheet, said heating means being closely adjacent to and spaced from the surface of the sheet having the powder pattern deposited thereon; and insulating means operatively associated with said transporting means, said insulating means having a plurality of fins extending transversely to the path of movement of the sheet and arranged to contact the other surface of the sheet as said transporting means advances the sheet from the receiving station to the delivery station.
Claim 8
Independent Claim
147 words
An apparatus having a sheet passageway therethrough for affixing permanently a powder pattern to a sheet Including: means for transporting the sheet with the powder pattern deposited on one surface thereof along a path of movement through the passageway from a sheet receiving station to a sheet delivery station; means for heating the powder pattern deposited on the sheet, said heating means being closely adjacent to and spaced from the surface of the sheet having the powder pattern deposited thereon; and insulating means operatively associated with said transporting means, said insulating means having a plurality of fins extending transversely to the path of movement of the sheet and arranged to contact the other surface of the sheet as said transporting means advances the sheet from the receiving station to the delivery station, said insulating means having at least a pair of fins extending transversely to one another.
Claim 9
Independent Claim
147 words
An apparatus having a sheet passageway therethrough for affixing permanently a powder pattern to a sheet Including: means for transporting the sheet with the powder pattern deposited on one surface thereof along a path of movement through the passageway from a sheet receiving station to a sheet delivery station; means for heating the powder pattern deposited on the sheet, said heating means being closely adjacent to and spaced from the surface of the sheet having the powder pattern deposited thereon; and insulating means operatively associated with said transporting means, said insulating means having a plurality of fins extending transversely to the path of movement of the sheet and arranged to contact the other surface of the sheet as said transporting means advances the sheet from the receiving station to the delivery station, said insulating means having at least a pair of fins extending transversely to one another.
Claim 10
Dependent Claim
23 words
An apparatus as recited in claim 1, wherein said insulating means includes at least a pair of fins extending parallel to one another.
Claim 11
Dependent Claim
172 words
An electrostatographic printing machine of the type having a toner powder image of an original document being reproduced formed on a sheet of support material, including: a housing member having a passageway therethrough; means for transporting the sheet with the toner powder image deposited on one surface thereof along a path of movement through the passageway in said housing member from a sheet receiving station to a sheet delivery station; means for heating the powder pattern deposited on the sheet, said heating means being closely adjacent to and spaced from the surface of the sheet having the powder pattern deposited thereon; and insulating means operatively associated with said transporting means, said insulating means having a plurality of spaced fins extending transversely to the path of movement of the sheet and arranged to contact the other surface of the sheet as said transporting means advances the sheet from the receiving station to the delivery station, said heating means being substantially opposed from said insulating means with the passageway of said housing interposed therebetween.
Claim 12
Dependent Claim
172 words
An electrostatographic printing machine of the type having a toner powder image of an original document being reproduced formed on a sheet of support material, including: a housing member having a passageway therethrough; means for transporting the sheet with the toner powder image deposited on one surface thereof along a path of movement through the passageway in said housing member from a sheet receiving station to a sheet delivery station; means for heating the powder pattern deposited on the sheet, said heating means being closely adjacent to and spaced from the surface of the sheet having the powder pattern deposited thereon; and insulating means operatively associated with said transporting means, said insulating means having a plurality of spaced fins extending transversely to the path of movement of the sheet and arranged to contact the other surface of the sheet as said transporting means advances the sheet from the receiving station to the delivery station, said heating means being substantially opposed from said insulating means with the passageway of said housing interposed therebetween.
Claim 13
Dependent Claim
35 words
A printing machine as recited in claim 7, wherein said heating means includes a radiant energy source arrnaged to be in thermal communication with the sheet for supplying the energy output thereof onto the sheet.
Claim 14
Dependent Claim
180 words
An electrostatographic printing machine of the type having a toner powder image of an original document being reproduced formed on a sheet of support material, including: a housing member having a passageway therethrough; means for transporting the sheet with the toner powder image deposited on one surface thereof along a path of movement through the passageway in said housing member from a sheet receiving station to a sheet delivery station; a radiant energy source arranged to be in thermal communication with the sheet for supplying the energy output thereof onto the sheet, said radiant energy source comprising a plate member, a plurality of tubular heating elements secured to said plate member with the longitudinal axis thereof substantially parallel to one another, and means for energizing said heating elements; and insulating means operatively associated with said transporting means, said insulating means having a plurality of fins extending transversely to the path of movement of the sheet and arranged to contact the other surface of the sheet as said transporting means advances the sheet from the receiving station to the delivery station.
Claim 15
Dependent Claim
180 words
An electrostatographic printing machine of the type having a toner powder image of an original document being reproduced formed on a sheet of support material, including: a housing member having a passageway therethrough; means for transporting the sheet with the toner powder image deposited on one surface thereof along a path of movement through the passageway in said housing member from a sheet receiving station to a sheet delivery station; a radiant energy source arranged to be in thermal communication with the sheet for supplying the energy output thereof onto the sheet, said radiant energy source comprising a plate member, a plurality of tubular heating elements secured to said plate member with the longitudinal axis thereof substantially parallel to one another, and means for energizing said heating elements; and insulating means operatively associated with said transporting means, said insulating means having a plurality of fins extending transversely to the path of movement of the sheet and arranged to contact the other surface of the sheet as said transporting means advances the sheet from the receiving station to the delivery station.
Claim 16
Dependent Claim
189 words
An electrostatographic printing machine of the type having a toner powder image of an original document being reproduced formed on a sheet of support material, including: a housing member having a passageway therethrough; means for transporting the sheet with the toner powder image deposited on one surface thereof along a path of movement through the passageway in said housing member from a sheet receiving station to a sheet delivery station, said transporting means comprising an endless convEyor, means for driving said conveyor, and at least one sheet gripper secured to said conveyor for moving the sheet from the sheet receiving station to the sheet delivery station; means for heating the powder pattern deposited on the sheet, said heating means being closely adjacent to and spaced from the surface of the sheet having the powder pattern deposited thereon; and insulating means operatively associated with said transporting means, said insulating means having a plurality of fins extending transversely to the path of movement of the sheet and arranged to contact the other surface of the sheet as said transporting means advances the sheet from the receiving station to the delivery station.
Claim 17
Dependent Claim
189 words
An electrostatographic printing machine of the type having a toner powder image of an original document being reproduced formed on a sheet of support material, including: a housing member having a passageway therethrough; means for transporting the sheet with the toner powder image deposited on one surface thereof along a path of movement through the passageway in said housing member from a sheet receiving station to a sheet delivery station, said transporting means comprising an endless convEyor, means for driving said conveyor, and at least one sheet gripper secured to said conveyor for moving the sheet from the sheet receiving station to the sheet delivery station; means for heating the powder pattern deposited on the sheet, said heating means being closely adjacent to and spaced from the surface of the sheet having the powder pattern deposited thereon; and insulating means operatively associated with said transporting means, said insulating means having a plurality of fins extending transversely to the path of movement of the sheet and arranged to contact the other surface of the sheet as said transporting means advances the sheet from the receiving station to the delivery station.
Claim 18
Dependent Claim
168 words
An electrostatographic printing machine of the type having a toner powder image of an original document being reproduced formed on a sheet of support material, including: a housing member having a passageway therethrough; means for transporting the sheet with the toner powder image deposited on one surface thereof along a path of movement through the passageway in said housing member from a sheet receiving station to a sheet delivery station; means for heating the powder pattern deposited on the sheet, said heating means being closely adjacent to and spaced from the surface of the sheet having the powder pattern deposited thereon; and insulating means operatively associated with said transporting means, said insulating means having a plurality of fins extending transversely to the path of movement of the sheet and arranged to contact the other surface of the sheet as said transporting means advances the sheet from the receiving station to the delivery station, said insulating means having at least a pair of fins extending parallel to one another.
Claim 19
Dependent Claim
168 words
An electrostatographic printing machine of the type having a toner powder image of an original document being reproduced formed on a sheet of support material, including: a housing member having a passageway therethrough; means for transporting the sheet with the toner powder image deposited on one surface thereof along a path of movement through the passageway in said housing member from a sheet receiving station to a sheet delivery station; means for heating the powder pattern deposited on the sheet, said heating means being closely adjacent to and spaced from the surface of the sheet having the powder pattern deposited thereon; and insulating means operatively associated with said transporting means, said insulating means having a plurality of fins extending transversely to the path of movement of the sheet and arranged to contact the other surface of the sheet as said transporting means advances the sheet from the receiving station to the delivery station, said insulating means having at least a pair of fins extending parallel to one another.
Claim 20
Dependent Claim
24 words
A printing machine as recited in claim 7, wherein said insulating means includes at least a pair of fins extending parallel to one another.
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) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |