Abstract A heat and pressure roll fusing apparatus for fixing toner images to copy substrates, the toner being made of a thermoplastic resin. The apparatus includes an internally heated fuser roll cooperating with a back-up or pressure roll to form a nip through which the copy substrates pass with the images contacting the heated roll. The heated fuser roll is characterized by an outer layer or surface which by way of example is fabricated from silicone rubber. Sheet removal or supporting member in the form of flexible finger structures are provided. The fingers contact the surface of the heated fuser roll and therefore are constructed so as to preclude damage to the soft fuser roll surface should they tend to gouge it. In operation the fingers are sufficiently flexible so that when a misstrip occurs they can be deflected out of contact with the fuser roll and partially rotated thereby. Each finger structure may have either a single finger or two fingers. The fingers are mounted for 360° of rotation partially by the heated fuser roll and, in part, manually.
In a roll fuser apparatus comprising a deformable fuser roll and a heat source for elevating the surface temperature thereof, said fuser roll cooperating with a backup roll to form a nip through which copy sheets carrying toner images pass with the images contacting the heated fuser roll, and further comprising apparatus for separating said sheets from said heated fuser roll, the improvement comprising: at least one flexible stripper member supported in contact with said heated fuser roll; a stationary support shaft supporting said stripper member for 360° of rotation about said shaft and supporting said at least one flexible stripper member radially immovable with respect to said shaft, said at least one flexible stripper member being sufficiently flex ible whereby it can be deflected by said heated fuser roll and rotated thereby through a portion of said 360° and moved ou t of contact with said heated fuser roll, said stripper member being adapted to be manually rotated through the remaining portion of said 360° whereby it again contacts the surface of said heated fuser roll.
Claim 2
Dependent Claim
177 words
In a roll fuser apparatus comprising a deformable fuser roll and a heat source for elevating the surface temperature thereof, said fuser roll cooperating with a backup roll to form a nip through which copy sheets carrying toner images pass with the images contacting the heated fuser roll, and further comprising apparatus for separating said sheets from said heated fuser roll, the improvement comprising: at least one flexible stripper member supported in contact with said heated fuser roll; a stationary support shaft supporting said stripper member for 360° of rotation about said shaft and supporting said at least one flexible stripper member radially immovable with respect to said shaft, said at least one flexible stripper member being sufficiently flex ible whereby it can be deflected by said heated fuser roll and rotated thereby through a portion of said 360° and moved ou t of contact with said heated fuser roll, said stripper member being adapted to be manually rotated through the remaining portion of said 360° whereby it again contacts the surface of said heated fuser roll.
Claim 3
Dependent Claim
16 words
Apparatus according to claim 1 wherein said at least one stripper member comprises a finger-like structure.
Claim 4
Dependent Claim
18 words
Apparatus according to claim 1 wherein said at least one stripper member comprises a pair of finger-like structures.
Claim 5
Dependent Claim
28 words
Apparatus accordidng to claim 3 wherein said pair of finger-like structures form an integral structure wherein they are disposed in a straight line and pivotally supported intermediate thereof.