Bolster assembly for presses

Claim 1

A DETACHABLE BOLSTER UNIT FOR USE ON A PRESS HAVING A BED, A RECIPROCABLE RAM MOVABLE TOWARD AND AWAY FROM THE BED, DRIVE MEANS FOR THE RAM, AND A POWER TAKE-OFF FROM SAID DRIVE MEANS; SAID BOLSTER UNIT COMPRISING A BOLSTER PLATE HAVING AN UPPER WORK SURFACE FOR POSITIONING AND SUPPORTING A FIXTURE INDEPENDENTLY OF ANY DIRECT CONNECTION BETWEEN SAID FIXTURE AND SAID BED, SAID PLATE BEING ADAPTED FOR ATTACHMENT AND DETACHMENT TO AND FROM THE BED WITH THE FIXTURE ON THE WORK SURFACE SO AS TO POSITION THE FIXTURE IN THE PATH OF MOVEMENT OF THE RAM, MOVABLE INDEXING MEANS AND A DRIVE CONNECTION THEREFOR CARRIED BY THE PLATE, SAID DRIVE CONNECTION ADAPTED TO BE CONNECTED WITH SAID POWER TAKE-OFF, SAID PLATE, INDEXING MEANS AND DRIVE CONNECTION FORMING A PORTABLE UNIT ADAPTED PRIOR TO ATTACHMENT OF THE UNIT TO THE BED OF THE PRESS AND AT A POINT REMOVED FROM THE PRESS TO HAVE A FIXTURE PROPERLY LOCATED ON SAID SURFACE IN PROPER FIXED RELATIONSHIP TO SAID INDEXING MEANS AND TO THE RAM PATH, SAID INDEXING MEANS BEING CONSTITUTED BY A RIDGE CAM ROTATABLE ON A SUBSTANTIALLY HORIZONTAL AXIS, A ROTATABLE MEMBER CARRYING CAM-FOLLOWER ROLLERS ADAPTED TO ROTATE ON A SUBSTANTIALLY VERTICAL AXIS, SAID ROTATABLE MEMBER CARRYING A SUBSTANTIALLY HORIZONTAL INDEXING PLATE SPACED FROM AND OVERHANGING SAID FIXTURE-SUPPORTING SURFACE FOR COOPERATION WITH THE FIXTURE.