EP0314099A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Fixing apparatus with temperature control
Assignee: Kyocera Mita Industrial Co Ltd
•
Filing: 1988-10-26
•
Granted: —
•
Expires: 2008-10-26
Abstract
Abstract A fixing apparatus detects the surface temperature of a heat roller (10), detects the temperature of a press roller (30) which press-contacts the heat roller (10) and incorporates a heater (31) or the temperature of an external heating apparatus (30) heating that heat roller (10) from exterior, controls the heater (31) of the above mentioned press roller or the above mentioned external heating apparatus (30) based on the results of these detections, and thereby performs a high-quality fixing operation without damaging the heat roller (10).
Inventors
- 👤 Fuji Kazuo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 04:18
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2039
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
76 words
In a method of controlling temperature of a fixing apparatus having a heat roller (10) incorporating a heater (11), a press roller press-contacting the heat roller (10), and an external heating apparatus (30) heating said heat roller ( 10), a method of controlling temperature of a fixing apparatus, characterized by detecting temperatures of said heat roller (10) and external heating apparatus (30) and controlling said external heating apparatus (30) based on the results of these detections.
Claim 2
Dependent Claim
76 words
In a method of controlling temperature of a fixing apparatus having a heat roller (10) incorporating a heater (11), a press roller press-contacting the heat roller (10), and an external heating apparatus (30) heating said heat roller ( 10), a method of controlling temperature of a fixing apparatus, characterized by detecting temperatures of said heat roller (10) and external heating apparatus (30) and controlling said external heating apparatus (30) based on the results of these detections.
Claim 3
Dependent Claim
83 words
A fixing apparatus having a heat roller (10) incorporating a heater (11), a press roller press-contacting said heat roller, and an external heating apparatus (30) heating said heat roller (10), characterized by comprising a first detecting means (14) detecting the surface temperature of said heat roller (10), a second detecting means (42) detecting the temperature of said external heating apparatus (30), and a control part which receives the results of detections by these detecting means (14) and controls said external heating apparatus (30).
Claim 4
Dependent Claim
83 words
A fixing apparatus having a heat roller (10) incorporating a heater (11), a press roller press-contacting said heat roller, and an external heating apparatus (30) heating said heat roller (10), characterized by comprising a first detecting means (14) detecting the surface temperature of said heat roller (10), a second detecting means (42) detecting the temperature of said external heating apparatus (30), and a control part which receives the results of detections by these detecting means (14) and controls said external heating apparatus (30).
Claim 5
Dependent Claim
79 words
A fixing apparatus in accordance with claim 2, characterized in that said control part comprises a bridge circuit (461, 462, 46, 41, 42) utilizing a parallel circuit of the first detecting means (14) and the second detecting means (42), a comparator (43) comparing an output of said bridge circuit (461, 462, 46, 41, 42) with a reference voltage, and an on-off means (47) turning on or off said external heating apparatus (30) by an output from said comparator (43).
Claim 6
Dependent Claim
30 words
A fixing apparatus in accordance with claim 2, characterized in that said external heating apparatus (30) is a roller contacting the heat roller (10) and incorporates a second heater (31).
Claim 7
Dependent Claim
29 words
A fixing apparatus in accordance with claim 2, characterized in that said external heating apparatus (30) is a heating lamp (31) installed in the vicinity of said heat roller.
Claim 8
Dependent Claim
32 words
A fixing apparatus in accordance with claim 2, characterized in that said first detecting means (14) is located between the portion of outlet of paper passage and said external heating apparatus (30).
Claim 9
Dependent Claim
87 words
A fixing apparatus having a heat roller (30) incorporating first heating means (14) and a press roller (30) which press-contacts said heat roller (10) and incorporates second heating means (31), characterized by comprising a first detecting means (41) detecting the surface temperature of said heat roller (10), a second detecting means (42) detecting the surface temperature of said press roller, and a control part (40) which receives the results of detections by these detecting means (41, 42) and controls a heating means (30) of said press roller.
Claim 10
Dependent Claim
87 words
A fixing apparatus having a heat roller (30) incorporating first heating means (14) and a press roller (30) which press-contacts said heat roller (10) and incorporates second heating means (31), characterized by comprising a first detecting means (41) detecting the surface temperature of said heat roller (10), a second detecting means (42) detecting the surface temperature of said press roller, and a control part (40) which receives the results of detections by these detecting means (41, 42) and controls a heating means (30) of said press roller.
Claim 11
Dependent Claim
71 words
A fixing apparatus in accordance with claim 7, characterized in that said control part (40) comprises a bridge circuit utilizing a parallel circuit of the first detecting means (41) and the second detecting means (42), a comparator (43) comparing an output of said bridge circuit with a reference voltage (V₀), and an on-off means (47) turning on or off said external heating apparatus (30) by an output from said comparator (43).
Claim 12
Independent Claim
63 words
A method of controlling temperature of a fixing apparatus having a heat roller (10) incorporating first heating means (11), a press roller incorporating second heating means (31) press-contacting the heat roller (10), characterized in that said temperatures of the above mentioned heat roller and press roller are detected and the above mentioned press roller is controlled based on the results of these detections.
Claim 13
Independent Claim
63 words
A method of controlling temperature of a fixing apparatus having a heat roller (10) incorporating first heating means (11), a press roller incorporating second heating means (31) press-contacting the heat roller (10), characterized in that said temperatures of the above mentioned heat roller and press roller are detected and the above mentioned press roller is controlled based on the results of these detections.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.