What is claimed is:
1. A fuser assembly for an electrostatographic reproduction apparatus, said fuser assembly including a fuser member and a pressure member locatable in operative association to apply heat and pressure to a marking particle image carried by a receiver member to fix such marking particle image to said receiver member as said receiver member is transported between said fuser member and pressure member, a release oil oiler system for said fuser assembly, and a cleaner for cleaning said pressure member, said pressure member cleaner comprising:
a cleaning member including a fabric material adapted to be impregnated with release oil;
a drive mechanism associated with said cleaning member for moving said cleaning member relative to said pressure member such that said cleaning member is located in operative association with said pressure member, or said cleaning member is located in spaced relation remote from said pressure member; and
a logic and control unit for selectively activating said drive mechanism to move said cleaning member to said operative association location or said remote location.
2. The fuser assembly according to claim 1 wherein said cleaning member is a roller mounted to be selectively moved into and out of contact with said pressure member, or out of contact with said pressure member by said drive mechanism.
3. The fuser assembly according to claim 2 wherein said cleaning member roller includes a substantially rigid core covered with at least one layer of fabric material.
4. The fuser assembly according to claim 3 wherein said at least one layer of fabric material includes a plurality layers located one over another.
5. The fuser assembly according to claim 2 wherein said at least one layer of fabric material includes a wound elongated web divided by transverse perforated lines which define respective individual sheets and facilitate separation of one sheet from a subsequent sheet.
6. The fuser assembly according to claim 2 wherein said receiver member transport is due to rotation of said pressure member, and wherein said cleaning roller is rotated by said drive mechanism in a direction such that the surface thereof moves in the opposite direction to that of said pressure member
7. The fuser assembly oiler system according to claim 6 wherein said logic and control unit selectively activates said drive mechanism to move said cleaning member to said operative association location only when said reproduction apparatus is in a duplex copy cycle.
8. In association with a fuser assembly for an electrostatographic reproduction apparatus, said fuser assembly including a fuser member and a pressure member in operative association to apply heat and pressure to a marking particle image carried by a receiver member to fix such image to said receiver member as said receiver member is transported between said fuser member and pressure member, an applicator for applying release oil to said fuser assembly, and a pressure member cleaning member, a method for controlling the action of said cleaning member comprising the steps of:
providing said cleaning member with a replaceable fabric layer;
selectively activating said cleaning member to engage said pressure member so that said fabric layer serves to smooth out release oil on said pressure member and clean said pressure member; and
when used up, replacing said cleaning member fabric layer.
9. The method for controlling the action of said cleaning member according to claim 8 wherein the step of selectively activating said cleaning member occurs only during the electrostatographic reproduction apparatus cycle for producing and fusing duplex copies.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for preparing 4-3,5-bis(2-hydroxyphenyl)-1,2,4triazol-1-ylbenzoic acid of formula I
by reaction of 2-(2-hydroxyphenyl)benze1,3oxazin-4-one of formula II
with 4-hydrazinobenzoic acid of formula III
characterized in that the reaction is carried out in an organic acid or a mixture of an organic acid and an organic solvent.
2. The method according to claim 1, characterized in that as the organic acid, a C1 to C4 carboxylic acid is used.
3. The method according to claim 1, characterized in that as the organic acid, a C1 to C4 carboxylic acid is used that is substituted in the chain by one or more halogen atoms, the hydroxy group or an alkoxy group.
4. The method according to any of claims 1 to 3, characterized in that as the organic solvent, a solvent from the group including aromatic hydrocarbons, chlorinated solvents, ethers, esters and polar aprotic solvents is used.
5. The method according to claims 1 to 4, characterized in that the reaction is performed in the equimolar quantity or under a slight excess of 4-hydrazinobenzoic acid of formula III.
6. The method according to claims 1 to 5, characterized in that the reaction is carried out at temperatures from 20 to 160\xb0 C.
7. The method according to claim 6, characterized in that the reaction is carried out at the boiling temperature of the reaction mixture.
8. The method according to claims 1 to 7, characterized in that the reaction is carried out for 0.5 to 3 hours.