Image fixing device
First Claim
1. An image fixing device comprising:
- a rotatable fixing member for fixing a toner image onto an image bearing member;
a web member retaining therein a parting agent for coating the parting agent on said fixing member and for cleaning the surface of said fixing member;
a first urging member for sandwiching said web member between it and said fixing member at a first region on the surface of said fixing member and urging said web member against the surface of said fixing member;
a second urging member for sandwiching said web member between it and said fixing member at a second region on the surface of said fixing member downstream of said first region with respect to the direction of rotation of said fixing member, said second urging member urging said web member against the surface of said fixing member; and
means for moving said web member in such a manner that said web member is moved at said first and second regions, in a direction opposite to the direction of rotation of said fixing member, whereby said web member mainly cleans said first region of said fixing member and mainly coats the parting agent at said second region of said fixing member.
1 Assignment
0 Petitions
Accused Products
Abstract
An image fixing device having a rotatable fixing member to fix a toner image formed on an image holding member by an image forming process such as electrophotographic process, electrostatic recording process, magneto-photographic process, etc. under pressure or heat application to the image holding member; a thin film member holding therein a parting or releasing agent; and a plurality of urging members to be press-contacted to the fixing member through the thin film member. The device has such effects that it exhibits satisfactory cleaning effect of the rotatable fixing member over a long period of time, enables the parting agent to be uniformly and stably applied onto the fixing member, and prevents an offset phenomenon from occurring by synergistic effects of the satisfactory cleaning and the uniform liquid application, thereby improving the life of the fixing roller to a remarkable extent.
12 Citations
20 Claims
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1. An image fixing device comprising:
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a rotatable fixing member for fixing a toner image onto an image bearing member; a web member retaining therein a parting agent for coating the parting agent on said fixing member and for cleaning the surface of said fixing member; a first urging member for sandwiching said web member between it and said fixing member at a first region on the surface of said fixing member and urging said web member against the surface of said fixing member; a second urging member for sandwiching said web member between it and said fixing member at a second region on the surface of said fixing member downstream of said first region with respect to the direction of rotation of said fixing member, said second urging member urging said web member against the surface of said fixing member; and means for moving said web member in such a manner that said web member is moved at said first and second regions, in a direction opposite to the direction of rotation of said fixing member, whereby said web member mainly cleans said first region of said fixing member and mainly coats the parting agent at said second region of said fixing member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification