US4377336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heated pressure rolls
Assignee: BUNNINGTON CORP
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Filing: 1981-06-08
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Granted: 1983-03-22
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Expires: 2001-06-08
Abstract
Abstract Pressure rolls useful in printing, embossing, coating, calendering, conveying, and fixing images to substrates. The pressure rolls comprise a cylindrical core provided with an array of axial slots, a heating element disposed in the slots, and a shell around the core. The pressure rolls may be employed in apparatus for fixing a toner material image pattern on a substrate such as a paper sheet. The pressure contact between the sheet and the pressure rolls is established by a hydrostatic assembly which may be pre-set.
Inventors
- 👤 Dale B. Parks
- 👤 Ronald A. Fannon
- 👤 Ronald T. Kosmider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:26
CPC Classifications
B; B44; B44B; B44B5/00; B44B5/0004; B44B5/0009; B44B5/02; B44B5/028; G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2092; B29; B29C; B29C43/00; B29C43/32; B29C43/44; B29C43/46; B29C2043/461; B29C2043/463; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
57 words
Pressure roll apparatus comprising a cylindrical core having a general circular configuration and provided with an array of axial slots comprising circular sectors, said axial slots being alternately bordered by an array of cavities having a depth substantially less than that of said axial slots, a heating element in said slots, and a shell around said core.
Claim 2
Dependent Claim
57 words
Pressure roll apparatus comprising a cylindrical core having a general circular configuration and provided with an array of axial slots comprising circular sectors, said axial slots being alternately bordered by an array of cavities having a depth substantially less than that of said axial slots, a heating element in said slots, and a shell around said core.
Claim 3
Dependent Claim
15 words
Pressure rolls apparatus as set forth in claim 1 wherein said core is an extrusion.
Claim 4
Dependent Claim
23 words
Pressure roll apparatus as set forth in claim 1 wherein said slots have sections which are at least partially circular in cross section.
Claim 5
Dependent Claim
25 words
Pressure roll apparatus as set forth in claim 1 wherein said slots have equal center to center distance therebetween along the periphery of said core.
Claim 6
Dependent Claim
29 words
Pressure roll apparatus as set forth in claim 1 wherein alternate ones of said slots in a direction around said core have different lengths radially inwardly of said core.
Claim 7
Dependent Claim
32 words
Pressure roll apparatus as set forth in claim 1 wherein alternate ones of said axial slots of said core component contain said heating element and are deeper than the slots adjacent thereto.
Claim 8
Dependent Claim
86 words
Pressure roll apparatus comprising a cylindrical core of material having a plurality of axial slots in side-by-side relationship, said axial slots being alternately bordered by an array of cavities having a depth substantially less than that of said axial slots, a tubular sleeve over said core having an inside diameter which is less than the outside diameter of said core at ambient temperature and greater than the outside diameter of said core at cryogenic temperatures, and a heating element disposed in said slots of said core.
Claim 9
Dependent Claim
86 words
Pressure roll apparatus comprising a cylindrical core of material having a plurality of axial slots in side-by-side relationship, said axial slots being alternately bordered by an array of cavities having a depth substantially less than that of said axial slots, a tubular sleeve over said core having an inside diameter which is less than the outside diameter of said core at ambient temperature and greater than the outside diameter of said core at cryogenic temperatures, and a heating element disposed in said slots of said core.
Claim 10
Dependent Claim
106 words
Apparatus for providing a permanent image on a sheet by fixing an image of toner material which is obtained from an electrostatic latent image by depositing toner material upon said sheet to provide such toner material image in conformity with said latent image, said apparatus comprising at least one pressure roll comprising a sleeve component and a core component, said core component having a general circular configuration with an array of axial slots comprising circular sectors, said axial slots being alternately bordered by an array of cavities having a depth substantially less than that of said axial slots, and a heating element disposed in said slots.
Claim 11
Dependent Claim
106 words
Apparatus for providing a permanent image on a sheet by fixing an image of toner material which is obtained from an electrostatic latent image by depositing toner material upon said sheet to provide such toner material image in conformity with said latent image, said apparatus comprising at least one pressure roll comprising a sleeve component and a core component, said core component having a general circular configuration with an array of axial slots comprising circular sectors, said axial slots being alternately bordered by an array of cavities having a depth substantially less than that of said axial slots, and a heating element disposed in said slots.
Claim 12
Dependent Claim
19 words
An apparatus in accordance with claim 8 wherein said sleeve component comprises steel and said core component comprises aluminum.
Claim 13
Dependent Claim
95 words
Apparatus for providing a permanent image on a sheet by fixing an image of toner material thereto, said apparatus comprising at least one pressure roll comprising a sleeve component and a core component, said core component having a general circular configuration with an array of axial slots comprising circular sectors, said axial slots being alternately bordered by an array of cavities having a depth substantially less than that of said axial slots, a heating element disposed in said slots, and a hydrostatic assembly for establishing a contact pressure between said pressure roll and said sheet.
Claim 14
Dependent Claim
95 words
Apparatus for providing a permanent image on a sheet by fixing an image of toner material thereto, said apparatus comprising at least one pressure roll comprising a sleeve component and a core component, said core component having a general circular configuration with an array of axial slots comprising circular sectors, said axial slots being alternately bordered by an array of cavities having a depth substantially less than that of said axial slots, a heating element disposed in said slots, and a hydrostatic assembly for establishing a contact pressure between said pressure roll and said sheet.
Claim 15
Dependent Claim
25 words
Apparatus for providing a permanent image on a sheet as set forth in claim 10 wherein said contact pressure is pre-set from said hydrostatic assembly.
References Cited (Backward Citations)
US1938995A
Cited
US3365774A
Cited
US3731367A
Cited
US3751216A
Cited
US4019024A
Cited
US3874894A
Cited
US3988061A
Cited
US4025751A
Cited
US4065586A
Cited
US4078286A
Cited
US4109135A
Cited
US4179601A
Cited
US4196256A
Cited
US4266115A
Cited
US4339194A
Cited
US4329566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-21 | 1986-09-20 | 1987-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-21 | 1990-09-20 | 1991-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-21 | 1994-09-20 | 1995-03-22 | $7700.00 | Window Closed / Lapsed |