Patent ID: 6587664
Filing Date: 2003-07-01
Classification: G03G

Abstract:
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, said pressure load force applying mechanism comprising:a load arm assembly rotatable about a fixed pivot axis to apply a pressure force to said pressure member; a load cam selectively rotated about a drive shaft; a cam follower member, associated with said load cam, wherein a force of said load cam is applied via said cam follower member to said load arm assembly; and a spring nest formed as a part of said load arm assembly, said spring nest supporting at least a heavy spring and a light spring, wherein said cam follower member, upon movement under the influence of said load cam, compresses said nested light spring and said heavy spring at different travel positions of said cam follower for varying the pressure force on said pressure member.