Patent ID: 8419300

Claim:
A modular roll bar assembly for use in a continuous web imaging device, the assembly comprising: a support frame; a plurality of roll bars coupled to the support frame to define a web path having a non-linear shape; a base member and a piston assembly; a first upper arm pivotably coupled to a first lateral side of the support frame at one end and pivotably coupled to a piston receiving portion of the piston assembly at an opposing end; a second upper arm pivotably coupled to a second lateral side of the support frame at one end and pivotably coupled to a piston of the piston assembly at an opposing end; a first lower arm pivotably coupled to a first lateral end of the base member at one end and pivotably coupled to the piston receiving portion of the piston assembly at an opposing end; a second lower arm pivotably coupled to a second lateral end of the base member at one end and pivotably coupled to the piston of the piston assembly at an opposing end; the first and the second upper arms and the first and the second lower arms being configured to translate the down force applied to the plurality of roll bars to an axial load on the piston assembly; a load cell operably coupled to the support frame and to the piston assembly, the load cell being configured to generate a signal indicative of a down force applied to the support frame, the signal being generated with reference to the axial load on the piston assembly; and a controller operably coupled to the load cell to receive the signal generated by the load cell and to correlate the down force applied to the support frame indicated by the signal to a tension measurement value for the continuous web.