SHARP SP1673 Technical Report

Date: Dec. 8, 1993

COPIER : Z-72

PREVENTING DEFORMATION IN THE PRESSURE
ROLLER DUE TO A LONG PERIOD STORAGE

1.Model name: Z-50, 55, 70, 75, 72, 76, 77, SF-6100

2.General: To avert dent on the tension roller owing to a long storage, the tension roller protective

sheet is inserted between the upper heat roller and the tension roller. Notwithstanding,
as it is probable to cause a dent to appear on the tension roller if stored for a long time
under a hot and dampen location with the action taken, change is made to the
mechanism to avoid tension on the roller while it is being stored.

No. : SP-1673

3.Reason: To avert dent on the tension roller when stored for a long period.

4.Description: A cut is provided in the fuser frames F and R, respectively, to stretch the upper fuser

unit to the front when packed, which engages the upper fuser unit pressed part with the
cut to avoid the tension. When the machine is unpacked, the upper fuser unit is pushed
towards the rear side with a spring to added the tension to the fuser roller. With change,
the use of the tension roller protective sheet is discontinued, with change also made in
the unpacking instruction label and the description in the operation manual.

SHARP CORPORATION Reprography Division

1/5

Green

C

Changed in the fuser unit front side

Spring added

Changed to

Cup screw added

Arrow view P
On the opposite side where the fuser tape pasted, a 0.5 thick fuser tape B is pasted

Change in the fuser handle
(cut added)

Change in the fuser frame F
(cut and fuser tape added)

Fuser tape
pasted

Change in the fuser baseplate F
Stud (E-ring discontinued to use and

M4 tapping screw added)

2/5

Fuser tape B (0.5 thick) pasted