Cleaning device for yarn carrying rotary cylinders of textile machines

Claim 1

A DEVICE FOR CLEANING BANKS OF ROLLERS, PARTICULARLY DRAFTING ROLLS OF TEXTILE MACHINES COMPRISING, IN COMBINATION; AT LEAST A PAIR OF COOPERATIONG ROTATABLE ROLLER MEANS ADAPTED TO PASS WEB IN A PREDETERMINED DIRECTION OF TRAVEL, CLEANER MEANS DISPOSED ADJACENT EACH OF SAID ROLLERS MEANS AND COOPERABLE THEREWITH, EACH OF SAID CLEANER MEANS INCLUDING A BLADE PORTION PROVIDED WITH A PAIR OF CONVERGING BLADE SURFACES DEFINING A BLADE EDGE NORMALLY CONTACING THE PERIPHERY OF ITS ASSOCIATED ROLLER MEANS TO DEFINE A LINE OF CONTACT, ONE OF SAID CONVERGING BLADE SURFACES BEING ORIENTED AT A PREDETERMINED INCLINATION ON THE DOWNSTREAM SIDE OF SAID LINE OF CONTACT RELATIVE TO SAID PREDETERMINED DIRECTION OF WEB TRAVEL AND WITH RESPECT TO A PLANE TANGENT TO SAID ASSOCIATED ROLLER MEANS AND TAKEN THROUGH SAID LINE OF CONTACT TO DEFINE AN ACUTE ANGLE, SAID CLEANER MEANS THEREBY PERMITTING UNDESIRABLE MATERIALS AND FIBERS WHICH ARE TO BE REMOVED TO INITIALLY MOVE BETWEEN SAID PREDETERMINED INCLINED DOWNSTREAM SIDE BLADE SURFACE AND ITS ASSOCIATED ROLLER MEANS, PAST SAID BLADE EDGE FOR SUBSTANTIAL REMOVAL THEREOF ADJACENT THE OTHER CONVERGING BLADE SURFACE OF SAID BLADE PORTION DISPOSED ON THE UPSTREAM SIDE OF SAID LINE OF CONTACT AND WITH RESPECT TO SAID PREDETERMINED DIRECTION WEB TRAVEL, WHEREBY SAID UNDESIRABLE MATERIALS AND FIBERS ARE REMOVED SUBSTANTIALLY AT ONLY SAID UPSTREAM SIDE OF SAID BLADE PORTION.

Claim 2

A DEVICE FOR CLEANING BANKS OF ROLLERS, PARTICULARLY DRAFTING ROLLS OF TEXTILE MACHINES COMPRISING, IN COMBINATION; AT LEAST A PAIR OF COOPERATIONG ROTATABLE ROLLER MEANS ADAPTED TO PASS WEB IN A PREDETERMINED DIRECTION OF TRAVEL, CLEANER MEANS DISPOSED ADJACENT EACH OF SAID ROLLERS MEANS AND COOPERABLE THEREWITH, EACH OF SAID CLEANER MEANS INCLUDING A BLADE PORTION PROVIDED WITH A PAIR OF CONVERGING BLADE SURFACES DEFINING A BLADE EDGE NORMALLY CONTACING THE PERIPHERY OF ITS ASSOCIATED ROLLER MEANS TO DEFINE A LINE OF CONTACT, ONE OF SAID CONVERGING BLADE SURFACES BEING ORIENTED AT A PREDETERMINED INCLINATION ON THE DOWNSTREAM SIDE OF SAID LINE OF CONTACT RELATIVE TO SAID PREDETERMINED DIRECTION OF WEB TRAVEL AND WITH RESPECT TO A PLANE TANGENT TO SAID ASSOCIATED ROLLER MEANS AND TAKEN THROUGH SAID LINE OF CONTACT TO DEFINE AN ACUTE ANGLE, SAID CLEANER MEANS THEREBY PERMITTING UNDESIRABLE MATERIALS AND FIBERS WHICH ARE TO BE REMOVED TO INITIALLY MOVE BETWEEN SAID PREDETERMINED INCLINED DOWNSTREAM SIDE BLADE SURFACE AND ITS ASSOCIATED ROLLER MEANS, PAST SAID BLADE EDGE FOR SUBSTANTIAL REMOVAL THEREOF ADJACENT THE OTHER CONVERGING BLADE SURFACE OF SAID BLADE PORTION DISPOSED ON THE UPSTREAM SIDE OF SAID LINE OF CONTACT AND WITH RESPECT TO SAID PREDETERMINED DIRECTION WEB TRAVEL, WHEREBY SAID UNDESIRABLE MATERIALS AND FIBERS ARE REMOVED SUBSTANTIALLY AT ONLY SAID UPSTREAM SIDE OF SAID BLADE PORTION.