초록 ▼

A machine for feeding rolls of web material to a utilization device that is adapted to draw the web material into the utilization device. The roll machine includes a frame carrying a carriage that supports a pair of arms having respective chucks that are adapted to move toward and away from each oth

A machine for feeding rolls of web material to a utilization device that is adapted to draw the web material into the utilization device. The roll machine includes a frame carrying a carriage that supports a pair of arms having respective chucks that are adapted to move toward and away from each other for engaging and disengaging with the core of a roll that is being supported and fed. An overhead drive arrangement is used for driving the periphery of the roll in combination with a torque roller for maintaining tension in the web. A gravity loop of the material has its position sensed for control of the roll drive means in a manner to match the rate of use by the utilization device.

대표청구항 ▼

Apparatus for supporting and feeding web material from a roll having a support core to a utilization means that draws the web material thereto, said apparatus comprising; a frame, means for supporting the frame in a manner to enable the frame to be moved about, arm means carrying chuck means for rec

Apparatus for supporting and feeding web material from a roll having a support core to a utilization means that draws the web material thereto, said apparatus comprising; a frame, means for supporting the frame in a manner to enable the frame to be moved about, arm means carrying chuck means for receiving the roll core for support of the web material roll, means for supporting the arm means from the frame, drive means for engaging the outer periphery of the roll to drive the roll, means for supporting the drive means from the frame, roller means receiving the web material from the roll for support and guiding of the web material between the roll and utilization means, means for supporting the roller means from the frame, control means for sensing the draw rate of the web material into the utilization means to in turn control the rate of the drive of the drive means, wherein said arm means comprises a pair of arms and further comprising a carriage having separate physically operable means to enable horizontal and vertical motion of said arms, wherein said drive means includes belt means having direct surface contact with said web material roll and a drive motor the speed of rotation of which is controlled from said control means, wherein said roller means comprises a plurality of rollers and means supporting the rollers from a top of the frame, wherein the roller means is supported at the top of the frame to form a web material loop between the roller means and the utilization means, wherein said control means includes means for sening the depth of the web material loop to in turn control the drive means to maintain a substantially constant web material loop depth, wherein said means for sensing comprises an ultrasonic detector positioned under said web material loop, and wherein a support bar is pivotally connected to said frame for holding said detector.