Timed supply roll braking专利检索-曳力装置钓鱼与渔业专利检索查询-专利查询网

Timed supply roll braking

阅读：173发布：2022-09-27

专利汇可以提供Timed supply roll braking专利检索，专利查询，专利分析的服务。并且Apparatus for controlling the web tension in an intermittent motion web handling machine, and including a timed-controlled brake for the web supply roll to prevent inertia override of the supply roll when the web demand ceases during a temporary interruption of the operating cycle or when the machine is shut down. Web tension between web draw rolls and the supply roll is controlled during machine operation by a supply roll drag brake system. A dancer roll assembly regulates the speed of the web draw rolls, and also serves to accumulate and pay out the web according to web demand at a downstream processing station where the web is intermittently driven. The timed braking action is provided to assure that the web accumulated during cycle interruption or shutdown is sufficiently tensioned to enable a normal resumption of the production cycle.，下面是Timed supply roll braking专利的具体信息内容。

权利要求

1. In a web handling machine including a core shaft and variable speed web drive rolls for drawing the web according to web demand at web processing stations of the machine from a supply roll locked on said core shaft, the improvement comprising braking means for resisting the torque caused by the inertia of the supply roll on said core shaft, power means for actuating said braking means, and means for energizing said power means for a timed interval to decelerate the supply roll during interruption of the web demand.

2. Apparatus according to claim 1 wherein said braking means reacts against said core shaft, and a drag brake draped over the supply roll for continuously tensioning the web so that web tension is maintained irrespective of the application of said power energized brake.

3. In a web handling machine including a parent roll core shaft and means for drawing the web from a web supply roll locked on said core shaft, the improvement comprising timed braking means for said core shaft to prevent inertia override of said supply roll when the web feeding is periodically interrupted or stopped, said braking means being arranged to react against an end portion of said core sHaft, and means coordinated with the periodic feeding of the web material for actuating said braking means.

4. In a web handling machine, means for supporting a core shaft for a supply roll in either of two unwinding positions, power actuated friction braking means centrally located relative to said supporting means, a repositionable brake link carrying a friction surface engageable with a core shaft, and means pivotally mounting said brake link equidistant from said core shaft supporting means for engaging said friction surface with the core shaft in either unwinding position.

5. Apparatus according to claim 4 wherein said brake link is invertible to reposition its free end from one core shaft position to the other, said friction surface including a brake shoe pivotally connected to said brake link, said brake shoe being pivotable toward either side of said brake link for said core shaft engagement.

6. In a web handling machine, means for supporting a core shaft for a web supply roll, means for locking a supply roll on said core shaft, web drive rolls for pulling the web from said supply roll, a variable speed motor for driving said web drive rolls, control circuit means for governing the speed of said motor according to web demand, power braking means engageable with said core shaft, and control means for energizing said brake to retard and stop rotation of said supply roll.

7. In a web handling machine, means for supporting a core shaft for a web supply roll, means for locking a supply roll on said core shaft, web drive rolls for pulling the web from said supply roll, means for tensioning the web downstream of said web drive rolls, means for sensing the tension in the web, variable speed means for driving said web drive rolls, control means responsive to the web tension for adjusting the speed of said power means, power braking means for selectively decelerating said core shaft, and timed control means for energizing said braking means for a preselected time to decelerate said supply roll.

8. In a web handling machine, means for supporting two spaced core shafts in substantially horizontal parallelism, means locking a supply roll on one of said core shafts, a vertically reciprocable powered plunger equidistant from each of said core shafts, a brake link pivoted to said plunger, a brake shoe pivoted to the free end of said brake link for engaging the core shaft which carries the supply roll, a pivot block intermediate each core shaft and said plunger, and pivot means in each pivot block for selective engagement with said brake link to provide a fulcrum point so that when said plunger is elevated, said brake shoe is depressed to frictionally engage the supply roll core shaft.

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Timed supply roll braking

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