Means for dispensing pasty materials from cartridges

Claim 1

A DISPENSING APPARATUS FOR A CARTRIDGE OF PASTY MATERIAL HAVING AN OPENING COMPRISING A BODY, A DISPENSING NOZZLE MOUNTED IN SAID BODY ADAPTED FOR CONNECTION WITH SAID OPENING WHEN SAID CARTRIDGE IS POSITIONED IN SAID BODY, AN AXIS MOUNTED IN SAID BODY, A WHEEL HAVING A RECESS MOUNTED FOR ROTATION ABOUT SAID AXIS, A CATCH MEMBER MOUNTED ON A PIVOT WITHIN SAID RECESS, A PLUNGER IN SAID CARTRIDGE INITIALLY POSITIONED AWAY FROM SAID OPENING, A TAPE EXTENDING THROUGH SAID CARTRIDGE COOPERATING AT ONE END WITH SAID CATCH MEMBER AND CONNECTED AT ITS OTHER END TO SAID PLUNGER, MEANS FOR ROTATING SAID WHEEL TO WITHDRAW SAID TAPE FROM SAID CARTRIDGE AND THUS MOVE SAID PLUNGER, SAID CATCH MEMBER HAVING AN EXTREME OF MOVEMENT ABOUT SAID PIVOT IN ONE DIRECTION SO THAT IT EXTENDS BEYOND THE PERIPHERY OF SAID WHEEL TO ENABLE SAID TAPE TO BE CONNECTED THERETO AND IN THE OTHER DIRECTION BEING SUCH THAT SAID CATCH MEMBER IS POSITIONED SUBSTANTIALLY WITHIN THE PERIPHERY OF SAID WHEEL, AN EXTENSION MEMBER ON ONE SIDE OF SAID WHEEL COAXIAL WITH SAID CATCH MEMBER CONNECTED THEREWITH, SAID EXTENSION MEMBER BEING BIASSED TO RETAIN SAID CATCH MEMBER IN ITS OUTWARD POSITION, AND ACTUATABLE MEANS TO PREVENT ROTATION OF SAID EXTENSION MEMBER.