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Symmetrical load distribution between the hot roll and backup roll of a copier is obtained by a frame loaded at a single point with an adaptive coupling of one of the rolls in the frame.
English (United States)
This text was extracted from a PDF file.
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This is the abbreviated version, containing approximately
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Self Aligning Hot Roll Frame
Symmetrical load distribution between the hot roll and backup roll of a copier
is obtained by a frame loaded at a single point with an adaptive coupling of one
of the rolls in the frame.
Hot roll frame 10 consists of two side plates 11 and 12 attached to an
aluminum extrusion 15. Screws 16 and 17 pass through tight-fitting clearance
holes in the side plates 11 and 12 and are tightened to hold the plates firmly
against extrusion 15. Screws 18 and 19, as well as 20 and 21, are either
shoulder screws or standard screws which pass through loose-fitting clearance
holes in plates 11 and 12 and which are tightened adequately to hold plates 11
and 12 against extrusion 15. Screws 18-21 are kept from loosening such as
through interference fits between the threads thereof and extrusion 15. Screws
18-21 serve to hold plates 11 and 12 against extrusion 15 while allowing plates
11 and 12 limited freedom to pivot around screws 16 and 17. Thus when the
rolls are initially loaded together as by causing hot roll 25 to engage backup roll
26, a load imbalance forces the side plates 11 and 12 to realign. This results in s
more symmetrical load at the nip nip between rollers 25 and 26 by establishing a
more parallel condtion between these rolls. The load is applied at the center of
the frame, as indicated generally by downward arrow 30 onto ridge 31. The
entire frame 10 pivots around shaft 32, which is relatively rigidly attached to