Wound material tensioning device

Claim 1

IN MEANS FOR SUPPLYING AND TENSIONING MATERIAL, A SUPPORT, A HOLDER ROTATABLY MOUNTED ON SAID SUPPORT AND ADAPTED TO HOLD A SPIRALLY WOUND ROLL OF MATERIAL FOR RUNOFF FROM FULL TO EMPTY POSITIONS TOWARD A WORK SOURCE, SAID HOLDER HAVING A BRAKING SURFACE, A BRAKE BAND OPERATIVELY ASSOCIATED WITH SAID BRAKING SURFACE, CONTROL MEANS OPERATIVELY CONNECTED TO SAID BRAKE BAND AND PIVOTALLY CARRIED BY SAID SUPPORT IN SPACED RELATION WITH THE ROTATIONAL AXIS OF SAID HOLDER AND WITH ITS PIVOTAL AXIS BEING CONFINED TO A LOCATION ADJACENT A LINE MIDWAY BETWEEN SAID POSITIONS, A SPRING SECURED TO SAID CONTROL MEANS FOR PIVOTING THE LATTER TO ACTUATE SAID BRAKE BAND, THE POSITION OF SAID CONTROL MEANS, RELATIVE TO ANGLES OF APPROACH OF THE MATERIAL THERETO DURING SAID RUNOFF FROM SAID FULL TO EMPTY POSITIONS AND WHEN MATERIAL TRAVELS FROM SAID CONTROL MEANS TO THE WORK SOURCE DURING RUNOFF, BEING SUCH THAT MATERIAL TRAVELLING FROM SAID CONTROL MEANS WILL BE OF A SUBSTANTIALLY UNIFORM TENSION FROM SAID FULL TO EMPTY POSITIONS DURING RUN-OFF.