摘要:
A system for dispensing film wrap is disclosed, the system comprises a dispenser having a first connector portion and second connector portion spaced apart from the first connector portion. A roll of film wrap comprising a core having film wrap wound thereon is configured to extend between the first connector portion and the second connector portion. At least one end of the wall of the core and/or the edge of the film wrap is profiled and interlockable with a complimentary interlocking member located at the remote end of the first or second connector portion so as to prevent lateral movement of the film wrap with respect to the first and second connector portions of the dispenser. This beneficially reduces slippage of the film wrap when it is being used to wrap a load.
摘要:
A winding device for winding up at least one material to be wound onto at least one exchangeable tube, having at least one winding mandrel which, in at least one operating state, is provided to receive the at least one tube and/or drive it in rotation about a winding axis, comprising at least one mass-determining unit which is provided to determine, in at least one instant of time during at least one winding-up operation, at least one mass characteristic of the at least one tube and/or of the at least one material to be wound that has been wound up in this instant on the at least one tube.
摘要:
A recording medium after printing which is discharged from a main body of a printer is guided from the main body to a support surface of a discharge support portion extending to a lower anterior side, and is wound as a roll body by a winding unit in a path that passes a tension roller. A tape-shaped elastic member is fixed on an end portion of a downstream side in a transport direction of the discharge support portion so as to extend in a width direction. An elastic friction surface is formed on the end portion of the downstream side in the transport direction of the support surface. A friction coefficient between the elastic friction surface and the recording medium is higher than the friction coefficient between a portion at an upstream side in the transport direction from the elastic friction surface in the support surface and the recording medium.
摘要:
An automatic dereeler includes a rocker arm that is movable between various positions to indicate the relative tension on a continuously supplied material. A sensor detects the rocker arm position which is transmitted to a controller. The controller actively controls a motor to either increase or decrease the resistive torque on a rotating axel that carries the continuous material.
摘要:
Various embodiments of an apparatus and method for dispensing elongated material, such as tape, from a spool of such material are disclosed. In one embodiment, a dispenser includes a rotatable spindle for supporting a first spool of material and a feedback mechanism for providing a controlled braking force to the spindle in response to changes in tension in the material being dispensed. The dispenser also can include another spindle for supporting a second spool of material. The trailing end portion of material from the first spool can be spliced to the leading end portion of material from the second spool to provide a continuous feed of material between the spools.
摘要:
A manual dispenser for stretch wrap material and having a dispenser body, a handle on the dispenser body and, a roll carrier extending from the dispenser body for receiving a roll of stretch wrap material and being rotatable so as to permit controlled unwinding of the stretch wrap material from the roll. The dispenser may be attached at one end of the core for single handed operation, or two dispensers may be used, one at each end of the roll for double handed operation. Core adapters are provided to accommodate rolls having cores of different sizes
摘要:
This invention pertains to processing continuous webs such as paper, film, composites and the like, in dynamic continuous processing operations. More particularly, it relates to accumulating limited lengths of such continuous webs and to controlling tension in such continuous webs during the processing operation. Both tension control and limited accumulations are achieved in festoon systems by connecting corresponding movably mounted festoon rolls to an actuator, sensing parameters such as position, tension, velocity, and acceleration related to the web and the festoon, and providing active force commands, in response to the sensed variables, to cause translational movement, generally including a target acceleration, in the movably mounted festoon rolls to control tension in the web while providing limited accumulation of a length of the web. The festoon control system can be used to attenuate tension disturbances, in the alternative to create controlled tension disturbances.
摘要:
A control arrangement for controlling web unwinding equipment used for feeding webs to a web-fed rotary printing machine stabilizes a swing roll used to tension the web at a central position via an integrator in a manner independent of the coefficient of friction. A proportional and differential element is connected in parallel with the integrator. The inputs of the integrator and the proportional and differential element are connected directly or indirectly to a swing-roll transmitter whose output is dependent on a position of the swing roll. The outputs of the integrator and the proportional and differential element act on an adder element. The output of the adder element acts directly or indirectly on a brake for braking the rotation of the wound roll.
摘要:
To prevent disalignment of the edges of a folded sheet by smoothly feeding the sheet to a packaging unit while keeping tension fluctuations to a minimum when the sheet is unwound from a paper roll set in a paper feed unit even though the paper roll diameter decreases gradually as the sheet is unwound. A sheet length measuring sensor or rotary encoder is provided in the paper feed path through which the packaging sheet is fed toward the packaging unit. An angle sensor is provided which includes Hall element sensors provided on a support shaft and magnets provided on a core pipe of the paper roll. Any change in the signals from one of these sensors relative to the signal from the other sensor is used to calculate the paper roll winding length, and the sheet tension is adjusted to an optimum, constant level by controlling the sheet braking force stepwise according to the roll diameter measured by the sensors.
摘要:
A tension control device for paper web used in a rotary printing machine which includes paper rolls each of which has a brake mechanism varied in response to fluid pressure to splice to a new roll when a preceding roll reaches to a predetermined remain level, comprises; a tension detecting mechanism for detecting the magnitude of the tension applied to the paper web; a fluid pressure feeding system including at least three routes for feeding respective different pressures to the brake mechanisms; a first brake-force adjusting mechanism to provide a first pressure which is reduced as the tension applied to the paper web increases; a second brake-force adjusting mechanism to provide a second pressure which is reduced as the tension applied to the paper web increases and is greater than the first pressure; a first switching mechanism to switch the fluid pressure route in response to one of predetermined emergency signals; and a second switching mechanism for feeding a third pressure greater than the maximum of the second pressure in response to a splicing operation signal.