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US 7,003,254 B2Granted
Fixing apparatus and image forming apparatus including the same
AssigneeFunai Electric Co., Ltd.
InventorMasaaki Tokuzaki
Life of this patent
Estimating the term…
Abstract
An electromagnetic valve mounting portion is formed by upwardly cutting a bottom surface of a frame and bending the upwardly cut portion like a L-shape in such a manner as to have a top surface part extending in substantially parallel with the bottom surface thereof. The electromagnetic valve mounting portion includes a top stationary part, whose top surface part has a U-shaped cutout part, and a pair of bottom supporting parts formed by upwardly bending both side portions of a bottom opening part, which is formed in the upwardly cut portion.
Claims6
A fixing apparatus comprising:
- a fixing roller, rotatably attached to a metallic frame, for fixing an image transferred to recording paper by heat;
- a pressure roller for pressing the recording paper against the fixing roller;
- a pressure releasing mechanism for releasing a pressure applied to the fixing roller by the pressure roller;
- and
- an electromagnetic valve mounting portion for mounting the electromagnetic valve thereon, wherein
- the pressure releasing mechanism includes a pair of crank-plates each supporting the pressure roller and being turnable around a predetermined supporting point, a spring member for pushing the pair of crank-plates in a direction so that the pressure applied to the fixing roller by the pressure roller is not released, a shaft member connecting the pair of crank-plates to each other and having a flat portion provided on a central portion of a bottom surface thereof, and an electromagnetic valve for turning the pair of crank-plates against a pushing force of the spring member by pushing up the central portion of the bottom surface of the shaft member;
- and
- the electromagnetic valve mounting portion includes a top stationary portion that is formed by upwardly cutting the bottom surface of the frame and then bending an upwardly cut part of the bottom surface like a L-shape in such a way as to have a top surface part extending in substantially parallel with the bottom surface and that has a U-shaped cutout part in the top surface part, and also includes a pair of bottom supporting portions formed by upwardly bending both side parts of a bottom opening portion formed in the upwardly cut part.
5 more elements
A fixing apparatus comprising:
- a fixing roller, rotatably attached to a metallic frame, for fixing an image transferred to recording paper by heat;
- a pressure roller for pressing the recording paper against the fixing roller;
- a pressure releasing mechanism for releasing a pressure applied to the fixing roller by the pressure roller;
- an electromagnetic valve mounting portion, formed by upwardly perpendicularly cutting a bottom surface of the metallic frame, for mounting thereon the electromagnetic valve having a U-shaped cutout portion;
- and
- a cam mounting portion, formed by bending a part of the metallic frame, for mounting the cam thereon, wherein
- the pressure releasing mechanism includes a pair of crank-plates each supporting the pressure roller and being turnable around a predetermined supporting point, a spring member for pushing the pair of crank-plates in a direction so that the pressure applied to the fixing roller by the pressure roller is not released, a shaft member connecting the pair of crank-plates to each other and having a flat portion provided on a central portion of a bottom surface thereof, and an electromagnetic valve for turning the pair of crank-plates against a pushing force of the spring member by pushing up the central portion of the bottom surface of the shaft member.
4 more elements
A fixing apparatus comprising:
- a fixing roller, attached to a metallic frame, for fixing an image transferred to recording paper by heat;
- a pressure roller for pressing the recording paper against the fixing roller;
- and
- a pressure releasing mechanism for releasing a pressure applied to the fixing roller by the pressure roller, wherein:
- the pressure releasing mechanism includes an electromagnetic valve serving as a drive source;
- and
- the metallic frame includes an electromagnetic valve mounting portion for mounting thereon an electromagnetic valve, and wherein the electromagnetic valve mounting portion includes a top stationary portion that is formed by upwardly cutting the bottom surface of the frame and then bending an upwardly cut part of the bottom surface like a L-shape in such a way as to have a top surface part extending in substantially parallel with the bottom surface and that has a U-shaped cutout part in the top surface part, and also includes a pair of bottom supporting portions formed by upwardly bending both side parts of a bottom opening portion formed in the upwardly cut part.
4 more elements
An image forming apparatus comprising
- a fixing apparatus including:
- a fixing roller, attached to a metallic frame, for fixing an image transferred to recording paper by heat;
- a pressure roller for pressing the recording paper against the fixing roller;
- and
- a pressure releasing mechanism for releasing a pressure applied to the fixing roller by the pressure roller, wherein:
- the pressure releasing mechanism includes an electromagnetic valve serving as a drive source;
- and the metallic frame includes an electromagnetic valve mounting portion for mounting thereon an electromagnetic valve, and wherein the electromagnetic valve mounting portion includes a top stationary portion that is formed by upwardly cutting the bottom surface of the frame and then bending an upwardly cut part of the bottom surface like a L-shape in such a way as to have a top surface part extending in substantially parallel with the bottom surface and that has a U-shaped cutout part in the top surface part, and also includes a pair of bottom supporting portions formed by upwardly bending both side parts of a bottom opening portion formed in the upwardly cut part.
4 more elements
Dependencies are inferred from the claim text.