| 摘要 |
An apparatus for extruding the stored fluid contents of a single cylindrical cartridge which has a side wall and a longitudinal partition wall which defines semicylindrical chambers within the cartridge, the apparatus comprising a cylindrical tube which has a closed end wall and an open end with an end with a bevelled edge. A pair of semicylindrical sleeve pistons are concentrically positioned in a spaced parallel relation within the tube, with the space between the pistons being coplanar with the partition wall to permit the sliding of the tube longitudinally along the external periphery of the cartridge. The pistons are each mounted on the closed end wall, within the tube, and include upstanding free ends which are adapted to engage corresponding slidable semicircular plungers that function as seals within the corresponding chambers of the cartridge. Both the cartridge and cylindrical tube are inserted into the hollow body of a conventional caulking gun, wherein external mechanical pressure is applied to the closed end of the tube. As the tube slides forward along the cartridge, in closely fitted relation therewith, the side wall of the cartridge is prevented from expanding due to the internal pressures, and the contents of the cartridge are expelled through a pair of outlet openings in accurately predetermined quantities.
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