초록

An extruder for a fluid material including a cartridge containing a fluid material, and pushing members for pushing an end of the cartridge so as to extrude the fluid material. The pushing members are arranged to be driven by a system of a pinion and racks put in motion through reduction gears.

대표청구항 ▼

An extruder for a fluid material comprising: a casing for holding a cartridge containing a fluid material and having an end thereof arranged to be pushed so as to extrude the fluid material contained in said cartridge; a plurality of pushing members for pushing said end of the cartridge so as to ext

An extruder for a fluid material comprising: a casing for holding a cartridge containing a fluid material and having an end thereof arranged to be pushed so as to extrude the fluid material contained in said cartridge; a plurality of pushing members for pushing said end of the cartridge so as to extrude the fluid material, said pushing members extending in parallel along a direction in which the cartridge end is pushed; a driving means for driving the pushing members to move successively in the direction of pushing the end of the cartridge so as to extrude the fluid material; and a displacement restraint means for restraining a subsequent pushing member from displacement toward the pushing direction and restrained by a smaller force than a driving force applied to a preceding pushing member when the preceding pushing member is driven to move in the pushing direction by the driving means; each of said pushing members having a rack formed on a side thereof facing in the same direction; and said driving means comprises a pinion positioned to mesh with the rack of the preceding pushing member to move it in the pushing direction when the subsequent pushing member is in its initial position.