Processes for manufacturing blade member of developer quantity control blade and manufacturing the blade

Abstract

A blade member manufacturing process using no mold and a developer quantity control blade manufacturing process using this blade member are disclosed in which a material for the blade member is extruded onto a charge control face face-transferring sheet in a uniform thickness, and solidified to form a layer, and the layer is cut into the shape of a blade member.

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       5 . A process for manufacturing a blade member of a developer quantity control blade which controls the quantity of a developer carried out of a developer container through a developer-carrying member; the process comprising the steps of: 
 co-extruding a molten resin for forming a charge control face face-transferring sheet and a molten resin for forming a blade member, followed by shaping into a cylinder by multi-layer blown-film extrusion;    cutting the cylinder in parallel to the direction of extrusion to form at least one multi-layer sheet having a blade member resin layer; and    cutting the multi-layer sheet at least at the blade member resin layer into the shape of the blade member.    
   
   
       6 . The blade member manufacturing process according to  claim 5 , wherein the resin for said face-transferring sheet is a straight-chain high polymer containing no polar group, and the resin for the blade member is a high polymer containing a polar group.  
   
   
       7 . The blade member manufacturing process according to  claim 6 , wherein said straight-chain high polymer containing no polar group is an olefinic high polymer, and said high polymer containing a polar group is a polyamide high polymer.  
   
   
       8 . The blade member manufacturing process according to  claim 5 , wherein a tack-reducing agent is ejected into the space between the face-transferring sheet molten resin and the blade member molten resin when they are co-extruded.  
   
   
       9 . The blade member manufacturing process according to  claim 8 , wherein said tack-reducing agent is air, an inert gas or a gas containing tack-free fine particles.  
   
   
       10 . The blade member manufacturing process according to  claim 5 , wherein said multi-layer sheet has a thickness of from 2 μm to 300 μm.  
   
   
       11 . The blade member manufacturing process according to  claim 5 , wherein said face-transferring sheet has a thickness of from 1 μm to 200 μm and said blade member has a thickness of from 1 μm to 100 μm.  
   
   
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       14 . A process for manufacturing a developer quantity control blade which controls the quantity of a developer carried out of a developer container through a developer-carrying member; the process comprising the steps of: 
 co-extruding a molten resin for forming a charge control face face-transferring sheet and a molten resin for forming a blade member, followed by shaping into a cylinder by multi-layer blown-film extrusion;    cutting the cylinder in parallel to the direction of extrusion to form at least one multi-layer sheet;    laminating a supporting member to the multi-layer sheet on its side with the blade member, to form a laminate;    cutting the laminate into the shape of a developer quantity control blade as a final shape.    
   
   
       15 . The developer quantity control blade manufacturing process according to  claim 14 , wherein said face-transferring sheet is not peeled in the course of the manufacturing process.