US5367369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image heating apparatus capable of controlling number of waves in AC power supply
Assignee: Canon Inc
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Filing: 1993-04-12
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Granted: 1994-11-22
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Expires: 2013-04-12
Abstract
Abstract An image heating apparatus including a heater which is stationary in use; a film movable together with a recording material in sliding contact with the heater, an image on the recording material being heated through the film by the heat from the heater, in a predetermined heating width; power supply source for supplying alternating power to the heater; a controller for controlling a number of waves of the power imparted to the heater in a predetermined unit of time; wherein the unit of time, a moving speed of the film, and the heating width of the heater satisfy: the unit of time</=(the heating width)/(the film speed).
Inventors
- 👤 Hironobu Nakai
- 👤 Shokyo Koh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:08
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2039; G03G15/2046; G03G15/2053; G03G2215/00; G03G2215/20; G03G2215/2003; G03G2215/2016
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
125 words
An image heating apparatus comprising: a heater which is stationary in use; a film movable together with a recording material in sliding contact with said heater, an image on the recording material being heated through said film by the heat from said heater, in a predetermined heating width; power supply means for supplying alternating power to said heater; and control means for controlling a number of waves of the power imparted to said heater in a predetermined unit of time, wherein the unit of time, a moving speed of said film, and the heating width of said heater satisfy; the unit of time≦(the heating width)/(the film speed), and wherein the unit of time is an integer multiple of a half cycle of the alternating power.
Claim 2
Dependent Claim
125 words
An image heating apparatus comprising: a heater which is stationary in use; a film movable together with a recording material in sliding contact with said heater, an image on the recording material being heated through said film by the heat from said heater, in a predetermined heating width; power supply means for supplying alternating power to said heater; and control means for controlling a number of waves of the power imparted to said heater in a predetermined unit of time, wherein the unit of time, a moving speed of said film, and the heating width of said heater satisfy; the unit of time≦(the heating width)/(the film speed), and wherein the unit of time is an integer multiple of a half cycle of the alternating power.
Claim 3
Dependent Claim
60 words
An image heating apparatus according to claim 1, wherein said heater comprises a heat generating layer for generating heat when supplied with the electric power and is disposed in such a manner that a longitudinal direction of said heater is substantially perpendicular to a moving direction of said film, the heating width being a width of said heating resistor layer.
Claim 4
Dependent Claim
68 words
An image heating apparatus according to claim 1, wherein said heater comprises a heat generating layer for generating heat when supplied with the electric power, and a highly heat conductive substrate for supporting said heat generating layer, said apparatus further comprising a backup member for forming a nip by being pressed to said heater, with said film interposed therebetween, the heating width being a width of the nip.
Claim 5
Dependent Claim
123 words
An image heating apparatus comprising: a heater which is stationary in use; a film movable together with a recording material in sliding contact with said heater, and images on the recording material being heated through said film by the heat from said heater; power supply means for supplying alternating power to said heater; control means for controlling a number of waves of the alternating power imparted to said heater in a predetermined unit of time; detecting means for detecting a datum of the alternating power source; and changing means for changing said unit of time in response to a detection result of said detecting means, wherein said unit of time constitutes an integer multiple of a half cycle of the alternating power source.
Claim 6
Dependent Claim
123 words
An image heating apparatus comprising: a heater which is stationary in use; a film movable together with a recording material in sliding contact with said heater, and images on the recording material being heated through said film by the heat from said heater; power supply means for supplying alternating power to said heater; control means for controlling a number of waves of the alternating power imparted to said heater in a predetermined unit of time; detecting means for detecting a datum of the alternating power source; and changing means for changing said unit of time in response to a detection result of said detecting means, wherein said unit of time constitutes an integer multiple of a half cycle of the alternating power source.
Claim 7
Dependent Claim
20 words
An image heating apparatus according to claim 4, wherein said detecting means detects a voltage of the alternating power source.
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) | 1997-11-21 | 1998-05-23 | 1998-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-21 | 2002-05-23 | 2002-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-21 | 2006-05-23 | 2006-11-22 | $7700.00 | Window Closed / Lapsed |