Patent ID: 7931171
Filing Date: 2011-04-26
Classification: B05B

Abstract:
1. A paint cartridge, comprising: a tank base composed of a mount block to be mounted on a coating apparatus, and a feed tube extended forward on a front side of said mount block; a first paint passage formed internally of said tank base through said feed tube; a baggy tank composed of a support member extended in forward and rearward directions, and a bag member formed of a flexible material and wrapped around said support member, said bag member having opposite ends thereof fixed liquid tight to said support member to define a paint chamber in said bag member; a second paint passage formed internally of said support member of said baggy tank with a rear end thereof opened to said paint chamber, a fore end of said second paint passage being brought into communication with said first paint passage when said baggy tank is attached to said tank base; a tank accommodating case in the form of a lidded tubular case having an open end portion on front side and being closed with a lid portion on rear side, said open end portion being detachably attached to said mount block in such a way as to grip opposite ends of said support member of said baggy tank between said mount block of said tank base and said lid portion; an extruding liquid chamber defined between said baggy tank and said tank accommodating case when said baggy tank is placed in said tank accommodating case after attaching the latter to said mount block of said tank base; and an extruding liquid passage provided on said tank base to supply an extruding liquid to and from said extruding liquid chamber, wherein said bag member of said baggy tank is a dual bag structure composed of an inner bag and an outer bag intervened by a gap space, and a leakage liquid discharge passage is formed in said support member of said baggy tank to communicate said gap space with the outside through said lid portion of said tank accommodating case.