Roller for fixing, manufacturing method therefor, and fixing device
AssigneeCanon Kabushiki Kaisha
InventorMichiaki Endo
Life of this patent
Estimating the term…
Abstract
A roller for image fixing, includes: a hollow cylindrical member; a shaft member inserted into one longitudinal end of the cylindrical member; a hole portion penetrating the cylindrical member and the shaft member; a first countersink formed at a circumference of one end of the hole portion in an outerside of the cylindrical member; a second countersink formed at a circumference of the other end of the hole portion in an outerside of the cylindrical member; and a pin inserted in the hole portion to fix the cylindrical member and the shaft member relative to each other. The one and the other end portions of the pin are deformed so as to be closely contacted to the first and second countersink portions, respectively.
Claims18
A roller usable as a rotatable member of a pair of rotatable members constituting a nip therebetween for heating an image on a sheet, said roller comprising:
- a hollow cylindrical member;
- a shaft member inserted into one longitudinal end of said cylindrical member;
- a hole portion penetrating said cylindrical member and said shaft member;
- a first countersink formed at a circumference of one end of said hole portion in an outerside of said cylindrical member;
- a second countersink formed at a circumference of the other end of said hole portion in an outerside of said cylindrical member;
- and
- a pin inserted in said hole portion to fix said cylindrical member and said shaft member relative to each other,
- wherein one and the other end portions of said pin are deformed so as to be closely contacted to said first and second countersink portions, respectively, wherein said hole portion is provided within a range of the nip portion with respect to the longitudinal direction.
A manufacturing method for a roller usable as a rotatable member of a pair of rotatable members constituting a nip therebetween for heating an image on a sheet, said method comprising steps of:
- inserting a shaft member into a one longitudinal end of a hollow cylindrical member;
- forming a hole portion penetrating said cylindrical member and said shaft member;
- forming a first countersink at a circumference of one end of said hole portion in an outerside of said cylindrical member;
- forming a second countersink at a circumference of the other end of said hole portion in an outerside of said cylindrical member;
- inserting a pin into said hole portion;
- and
- deforming opposite end portions of said pin so as to closely contact to said first and second countersink portions, respectively,
- wherein said hole portion is provided within the range of the nip portion with respect to the longitudinal direction.
A fixing device comprising:
- a rotatable member and a roller constituting a nip for heating an image on a sheet, said roller including,
- a hollow cylindrical member,
- a shaft member inserted into one longitudinal end of said cylindrical member,
- a hole portion penetrating said cylindrical member and said shaft member,
- a first countersink formed at a circumference of one end of said hole portion in an outerside of said cylindrical member,
- a second countersink formed at a circumference of the other end of said hole portion in an outerside of said cylindrical member, and
- a pin inserted in said hole portion to fix said cylindrical member and said shaft member relative to each other,
- wherein one and the other end portions of said pin are deformed so as to be closely contacted to said first and second countersink portions, respectively, and
- wherein said hole portion is provided within the range of the nip portion with respect to the longitudinal direction.
Dependencies are inferred from the claim text.