| 摘要 |
541,868. Syringes. DAHL, H. L. May 7, 1940, No. 8194. [Class 102 (ii)] [Also in Group VI] A device for dispensing dental stopping material rendered plastic by heat comprises a body portion 5 formed with an open-ended cylindrical chamber leading to a delivery duct 17, the chamber housing a removable cylindrical shell 16 of heat-insulating material which receives the stopping and is closed at the outer end by a flanged piston 18 adapted to be advanced by a follower 19 swivelled to a presser screw 20 working in a threaded cover 21. The body part is clamped to a table by means of an arm 8 through which passes the cable of the heating element 14, which is housed in a recess 6 closed by the base plate 12. |
