Abstract:
The negative pressure roll 1 is provided with a rotating shaft 2, an internal cylinder 3, an intermediate cylinder 4 and a multi-layered non-woven fabric laminated outer layer 5. Further, the rotating shaft 2 is a member at the center of rotation of the negative pressure roll 1 and connected to the internal cylinder 3 by a reinforcement circular disk 9. Still further, the internal cylinder 3 is formed in a tubular shape and rotates together with the rotating shaft 2. In addition, the rotating shaft 2 and the internal cylinder 3 correspond to a rotating main body. Further, the intermediate cylinder 4 is a cylindrical tubular material formed outside the internal cylinder 3 and rotates in association with the rotating shaft 2 and the internal cylinder 3. Still further, the multi-layered non-woven fabric laminated outer layer 5 is formed outside the intermediate cylinder 4 and given as a part at which the negative pressure roll 1 is in contact with the metal strip 13. The multi-layered non-woven fabric laminated outer layer 5 also rotates in association with the rotating shaft 2, the internal cylinder 3 and the intermediate cylinder 4. In addition, the negative pressure roll 1 is provided with a controller 6 for suppressing rotation of the negative pressure roll 1.
Abstract:
A media transport system is provided including providing a drive system, driving a drive train using the drive system, using the drive train to drive a media driver, and braking the drive train using a drive gear brake.
Abstract:
In controlling the tension in a web of material unwound from a roll, the web passes over a pendulum roll and a control system is connected to the pendulum roll to measure the tension and to determine any deviations from a predetermined tension value. Based on any such deviations, one or a series of setting members are regulated and these setting members adjust the braking action on a brake disc secured to journals supporting the roll of web material and thereby control the tension in the web. Where multiple setting members are used, various combinations of the setting members can be controlled by a single pressure medium in combination with pre-tensioning springs or differential pressure mediums can be used to achieve the desired braking effect.
Abstract:
A system for supporting a reel of stamping foil (2) that is mounted rotatably, includes: two flanges (9, 9′) connected to the shaft of the reel (2, 2′) that is positioned between the flanges, each flange having a rotary shaft extending outward of the reel; two end walls (7, 7′) mounted spaced apart on a guide surface (3′), each wall end having at least one upwardly oriented notch (10, 10′) arranged to receive the shaft of each flange (9, 9′); and a brake (13) which cooperates with and slows the rotation of the reel (2).
Abstract:
A stencil printer includes a stencil, a material applicator to apply material on the stencil, and a stencil wiper assembly to selectively wipe the stencil. The stencil wiper assembly includes has a quick-change material module having a supply roller to receive a roll of material, a take-up roller to receive used material, a drive to move the material across the stencil from the supply roller to the take-up roller, and a controllable tension device configured to vary a tension of the material when driving the material from the supply roller to the take-up roller.
Abstract:
A tension control assembly including a rotating member, a braking member, at least one brake pad, a means for driving the at least one brake pad against the braking member, and a temperature sensing means. The braking member is attached to the rotating member. The at least one brake pad is positioned adjacent to the braking member. The means for driving the at least one brake pad against the braking member forces frictional contact between the at least one brake pad and the braking member, thus providing torque to the rotating member. The temperature sensing means measures the temperature of the at least one brake pad.
Abstract:
A braking device 1 is provided for a tape reel mounted rotatably about its axis. The braking device 1 includes two rotating members 10, 20 rotationally coupled with the reel, and a selection member 30 configured to cooperate by friction selectively with either one of the rotating members 10, 20 by moving the selection member to engage one or the other rotating member for friction braking.
Abstract:
A paper roll braking device for rotary presses, in which a web is paid off from a paper roll supported between frames, caused to travel, and printed in a printing unit, comprising rotors provided on supporting members for supporting the paper roll, braking sections provided at a plurality of locations along the rotors and having friction discs that can engage with, or disengage from, the rotors at their respective locations, engage/disengage changeover sections for controlling the engage/disengage operation of the friction discs with respect to the rotors, and a tension sensing mechanism for sensing changes in the running tension of the web; a contact pressure adjusting section for adjusting the contact pressure of the friction discs to the rotors via the engage/disengage changeover section in accordance with the changes in running tension detected by the tension sensing mechanism, an outside diameter detecting section for detecting the outside diameter of the paper roll, and an operation control section for switching the engage/disengage changeover section as the paper roll outside diameter detected by the outside diameter detecting section reaches a predetermined diameter are provided.
Abstract:
A paper roll braking device for rotary presses, in which a web is paid off from a paper roll supported between frames, caused to travel, and printed in a printing unit, comprising rotors provided on supporting members for supporting the paper roll, braking sections provided at a plurality of locations along the rotors and having friction discs that can engage with, or disengage from, the rotors at their respective locations, engage/disengage changeover sections for controlling the engage/disengage operation of the friction discs with respect to the rotors, and a tension sensing mechanism for sensing changes in the running tension of the web; a contact pressure adjusting section for adjusting the contact pressure of the friction discs to the rotors via the engage/disengage changeover section in accordance with the changes in running tension detected by the tension sensing mechanism, an outside diameter detecting section for detecting the outside diameter of the paper roll, and an operation control section for switching the engage/disengage changeover section as the paper roll outside diameter detected by the outside diameter detecting section reaches a predetermined diameter are provided.
Abstract:
A method and an apparatus for winding or rewinding a running web onto the center core shafts of rolls. While the running web is being wound, at a selected speed, onto a first roll which is, disposed in an operating position, a center core shaft of a new, second roll is disposed in a splicing position so that the center core shafts are side by side and adjacent to each other. A fixed drive assembly and a movable drive assembly control the speeds of the first and second rolls, respectively. The first roll has had a determined amount of web wound thereon, the running web is spliced onto the center core shaft of the second roll and thereafter is wound onto the second roll. Thereafter, the second roll is disconnected from the fixed drive assembly and is removed from the operating position. The second roll, with the running web now being wound thereon, is then moved, with the movable drive assembly, from the splicing position to the operation position. Once there, the fixed drive assembly is connected with the second roll, and the movable drive assembly is disconnected from the second roll and moved back adjacent to the splicing position, ready to be connected with the center core shaft of another roll.