Roll stand with means for joining a web to another when unwound from rolls
AssigneeAB Amals Mekaniska Verkstad
InventorBengt A. Andreasson
Life of this patent
Estimating the term…
Abstract
A roller stand incorporating a device adapted to join a running web of material being unwound from a first roll to a web of material of a second roll and comprising a roll-holding device including two unwinding stations, means to cut the running web, a mechanism to exert a braking force on the spindles supporting said first and second rolls, and means provided to transfer rotational motion of said roll-support spindles to said braking mechanism by means of free-wheel members, said members being arranged to control said braking mechanism selectively for application of braking force on the roll-support spindle that at the moment has the highest rotational speed.
Claims8
An improved roller stand comprising a frame, two unwinding stations, a first roll of a web of material, a first rotating spindle supporting said first roll, a second roll of a web of material, a second rotating spindle supporting said second roll, means for joining the web of material being unwound from said first roll to the leading end of the web of material of said second roll, means arranged to transversely cut said first web of material, and a braking mechanism supported by the frame of the roller stand to exert a braking force [an] on said roll support spindles, the improvement comprising a roll-holding device, incorporating two end sections which are interconnected by stationary shafts, said shafts being parallel to said first and second rotating spindles and the centerlines of said shafts being included in a first plane which is at least approximately perpendicular to a second plane including the centerlines of said spindles and the intersection line between said first and second planes at least approximately coinciding with the rotation axis of said roll-holding device, said two unwinding stations positioned on said roll-holding device, and means to transfer the rotational movement of the associated roll-support spindle to said braking mechanism, said means comprising two free-wheel members, one for each roll support spindle, said members arranged to connect to said braking mechanism that one of said two roll support spindles that at the moment has the highest rotational speed , first cog wheels, one on each roll-support spindle at one end thereof, said cog wheels comprised in said means means to transfer the rotational movements of said roll support spindles to said braking mechanism, and second cog wheels rotatably mounted on support arms, said arms forming part of said roll-holding device, said second cog wheels arranged to mesh with said first cog wheels, and all cog wheels being mounted in a first of said end sections of said roll-holding device . [
An improved roller stand comprising a frame, two unwinding stations, a first roll of a web of material, a first rotating spindle supporting said first roll, a second roll of a web of material, a second rotating spindle supporting said second roll, means for joining the web of material being unwound from said first roll to the leading end of the web of material of said second roll, means arranged to transversely cut said first web of material, and a braking mechanism supported by the frame of the roller stand to exert a braking force on said roll support spindles, the improvement comprising a roll-holding device, incorporating two end sections which are interconnected by stationary shafts, said shafts being parallel to said first and second rotating spindles and the centerlines of said shafts being included in a first plane which is at least approximately perpendicular to a second plane including the centerlines of said spindles and the intersection line between said first and second planes at least approximately coinciding with the rotation axis of said roll-holding device, said two unwinding stations positioned on said roll-holding device, and means to transfer the rotational movement of the associated roll-support spindle to said braking mechanism, said means comprising two free-wheel members, one for each roll support spindle, said members arranged to connect to said braking mechanism that one of said two roll support spindles that at the moment has the highest rotational speed, the distance between said stationary shafts being approximately equal to the distance between said rotating spindles.
An improved roller stand comprising a frame, two unwinding stations, a first roll of a web of material, a first rotating spindle supporting said first roll, a second roll of a web of material, a second rotating spindle supporting said second roll, means for joining the web of material being unwound from said first roll to the leading end of the web of material of said second roll, means arranged to transversely cut said first web of material, and a braking mechanism supported by the frame of the roller stand to exert a braking force on said roll support spindles, the improvement comprising a roll-holding device, said two unwinding stations positioned on said roll-holding device, and means to transfer the rotational movement of the associated roll-support spindle to said braking mechanism, said means comprising two free-wheel members, one for each roll support spindle, said members arranged to connect to said braking mechanism that one of said roll support spindles that at the moment has the highest rotational speed, a housing located at an axial end of said roll-holding device, said means for transferring the rotational movement of the associated roll-support spindle to said braking mechanism including a plurality of intermeshing cog wheels extending from each spindle to a common cog wheel, said common cog wheel being operatively connected to said braking mechanism, said cog wheels located in said housing.
Dependencies are inferred from the claim text.