Device for measuring tack

Claim 1

A DEVICE FOR TESTING ADHESION BETWEEN TWO MATERIALS, COMPRISING TWO DISKS MOUNTED IN COPLANAR RELATIONSHIP WITH EACH OTHER, THE CIRCUMFERENCE OF EACH DISK BEING PROVIDED WITH CLAMPING MEANS FOR ONE END OF EACH OF TWO PLIES OF THE MATERIAL COMPRESSED TOGETHER, A MOTOR AND GEAR ASSEMBLY FOR DRIVING THE DISKS AT EQUAL SPEED IN OPPOSITE DIRECTIONS TO CAUSE SEPARATION OF THE PLIES, A PAIR OF GUIDING ROLLERS AROUND WHICH THE PLIES ARE PULLED APART AND DEFINING THE POINT OF SEPARATION, SAID PAIR OF ROLLERS BEING MOVABLE, MEANS FOR MEASURING THE SEPARATION FORCE, RECORDING MEANS, MEANS FOR COMPRESSING THE PLIES TOGETHER WITH AN ADJUSTABLE FORCE DURING AN ADJUSTABLE TIME, MEANS FOR EXACTLY DEFINING THE TEST SURFACE, SAID MEASURING MEANS COMPRISING DIFFERENTIAL GEARING MEANS INSERTED INTO THE DRIVING SHAFT SYSTEM BETWEEN THE MOTOR AND THE DISKS, SAID DIFFERENTIAL GEARING MEANS ACTING AS A FIXED GEAR TRAIN, THE MOTOR DRIVING ONE END GEAR AND THE OTHER END GEAR DRIVING THE DISKS, MEANS FOR APPLYING A VARIABLE FORCE TO THE SPIDER OF SAID GEAR TRAIN TO KEEP THE SPIDER STATIONARY, A DETECTING SYSTEM FOR DETECTING THE DISPLACMENT OF SAID SPIDER FROM A NEUTRAL POSITION, MEANS FOR VARYING THE FORCE APPLIED THERETO TO RETURN SAID SPIDER TO ITS NEUTRAL POSITION UPON DISPLACEMENT THEREOF, THE RECORDING DEVICE COOPERATING WITH THE VARIABLE FORCE APPLYING MEANS AND RECORDING SAID VARIABLE FORCE AS A FUNCTION OF TIME, THE SEPARATION FORCE BEING A FUNCTION OF THE FORCE REQUIRED TO MAINTAIN THE SPIDER SHAFT STATIONARY AS THE MOTOR DRIVES THE DISKS.

Claim 2

A DEVICE FOR TESTING ADHESION BETWEEN TWO MATERIALS, COMPRISING TWO DISKS MOUNTED IN COPLANAR RELATIONSHIP WITH EACH OTHER, THE CIRCUMFERENCE OF EACH DISK BEING PROVIDED WITH CLAMPING MEANS FOR ONE END OF EACH OF TWO PLIES OF THE MATERIAL COMPRESSED TOGETHER, A MOTOR AND GEAR ASSEMBLY FOR DRIVING THE DISKS AT EQUAL SPEED IN OPPOSITE DIRECTIONS TO CAUSE SEPARATION OF THE PLIES, A PAIR OF GUIDING ROLLERS AROUND WHICH THE PLIES ARE PULLED APART AND DEFINING THE POINT OF SEPARATION, SAID PAIR OF ROLLERS BEING MOVABLE, MEANS FOR MEASURING THE SEPARATION FORCE, RECORDING MEANS, MEANS FOR COMPRESSING THE PLIES TOGETHER WITH AN ADJUSTABLE FORCE DURING AN ADJUSTABLE TIME, MEANS FOR EXACTLY DEFINING THE TEST SURFACE, SAID MEASURING MEANS COMPRISING DIFFERENTIAL GEARING MEANS INSERTED INTO THE DRIVING SHAFT SYSTEM BETWEEN THE MOTOR AND THE DISKS, SAID DIFFERENTIAL GEARING MEANS ACTING AS A FIXED GEAR TRAIN, THE MOTOR DRIVING ONE END GEAR AND THE OTHER END GEAR DRIVING THE DISKS, MEANS FOR APPLYING A VARIABLE FORCE TO THE SPIDER OF SAID GEAR TRAIN TO KEEP THE SPIDER STATIONARY, A DETECTING SYSTEM FOR DETECTING THE DISPLACMENT OF SAID SPIDER FROM A NEUTRAL POSITION, MEANS FOR VARYING THE FORCE APPLIED THERETO TO RETURN SAID SPIDER TO ITS NEUTRAL POSITION UPON DISPLACEMENT THEREOF, THE RECORDING DEVICE COOPERATING WITH THE VARIABLE FORCE APPLYING MEANS AND RECORDING SAID VARIABLE FORCE AS A FUNCTION OF TIME, THE SEPARATION FORCE BEING A FUNCTION OF THE FORCE REQUIRED TO MAINTAIN THE SPIDER SHAFT STATIONARY AS THE MOTOR DRIVES THE DISKS.