| 摘要 |
A mechanism for applying pressure load force in a reproduction apparatus fuser device having at least one heated fuser member and a pressure member in nip relation to permanently fix a marking particle image to a receiver member. The pressure load force applying mechanism includes a load arm assembly rotatable about a fixed pivot axis to apply a pressure force to the pressure member, and a load cam selectively rotated about a drive shaft. A cam follower member is associated with the load cam, wherein a force of the load cam is applied via the cam follower member to the load arm assembly. A spring nest is formed as a part of the load arm assembly. The spring nest supports at least a heavy spring and a light spring; wherein the cam follower member, upon movement under the influence of the load cam, compresses the nested light spring and the heavy spring at different travel positions of the cam follower for varying the pressure force on the pressure member.
|
