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US 4,165,842 AGranted
Apparatus for replacing rotating mandrels on which a web is wound
AssigneeMagnat Corp.
InventorWilliam R. Mengel
Life of this patent
Estimating the term…
Abstract
Apparatus for replacing rotating mandrels on which a web is wound, featuring, in various aspects, improved means for accelerating new mandrels to match web speed prior to splicing, gravity-induced movement of the new mandrel between loading and main rotation stations, improved splicing and web severing means, and a temporary web tension control brake associated with a splice roll.
Claims29
Apparatus for unwinding rolls of web material wound on mandrels, comprising
- means for supporting a first said roll at an unwinding station from which web material is unwound,
- means for supporting a second said roll at a loading station spaced from said unwinding station,
- transfer means for moving said second roll over a path between said stations,
- a new roll accelerator located between said stations for engaging the mandrel of said second roll and rotating it to a peripheral speed matching the surface speed of the web unwinding from said first roll, and
- means for severing the web unwinding from said first roll and splicing the severed web end to said accelerated second roll,
- said accelerator having a mandrel engaging element movable relative to said second roll over at least a portion of said path to rotate said second roll and to operatively engage its mandrel at a plurality of different positions of said second roll relative to said element along said path.
3 more elements
Apparatus for replacing rotating mandrels on which a web is wound, comprising
- means for supporting a first said mandrel at a main rotation station with said web material wound on said mandrel and extending therefrom,
- means for supporting a second said mandrel at a loading station spaced from said main station,
- means for providing movement of said second mandrel between said stations, comprising a stop movable along said path and means for retracting said stop from said path,
- an accelerator for engaging said second mandrel and rotating and accelerating it in accordance with the surface speed of the web extending from said first mandrel, and
- means for severing the web extending from said first mandrel and transferring the severed web end to said accelerated second mandrel.
2 more elements
Apparatus for replacing rotating mandrels on which a web is wound, comprising
- means for supporting a first said mandrel at a main rotation station with said web wound on said mandrel and extending therefrom,
- means for supporting a second said mandrel at a loading station spaced from said main station,
- transfer means for moving said second mandrel over a path between said stations,
- a new mandrel accelerator located between said stations for engaging the said second mandrel and rotating and accelerating it in accordance with the surface speed of the web extending from said first mandrel,
- means for severing the web extending from said first mandrel and transferring the severed web end to said accelerated second mandrel, including a splice roll movable between a retracted position and a transfer position adjacent a mandrel stop station, said stop station being between said loading and main rotation stations, and
- sensing means to initially position said second mandrel at said stop station just short of the transfer position of said splice roll.
3 more elements
Apparatus for unwinding rolls of web material wound on mandrels, comprising
- means for supporting a first said roll at an unwinding station from which web material is unwound,
- means for supporting a second said roll at a loading station spaced from said unwinding station,
- transfer means for moving said second roll over a path between said stations,
- a new roll accelerator for engaging said second roll and rotating it to a peripheral speed matching the surface speed of the web unwinding from said first roll, and
- means for severing the web unwinding from said first roll and splicing the severed web end to said accelerated second roll,
- said means for severing and splicing including a splice roll movable between a retracted position and a splicing position, a main tension control brake being provided at said unwinding station, and a further brake being associated with said splice roll to control web tension while said web is engaged with said splice roll and said second roll moves to said unwind station.
3 more elements
Apparatus for unwinding rolls of web material wound on mandrels, comprising
- means for supporting a first said roll at an unwinding station at which web material is unwound from said roll, and for supporting a second said roll at a loading station spaced from said unwinding station,
- means for moving said second roll along a path between said stations,
- a new roll accelerator for engaging said second roll and accelerating it to match the peripheral speed of said second roll to the surface speed of the web unwinding from said first roll,
- means for severing the web unwinding from said first roll and splicing the severed web end to said accelerated second roll, and
- means automatically responsive to the diameter of said second roll to control the speed of said accelerator.
2 more elements
Dependencies are inferred from the claim text.