Elastic thread supply device
AssigneeUnicharm Corporation
InventorHiroki Yamamoto
Life of this patent
Estimating the term…
Abstract
An elastic thread supply device including a tension controller configured to control the stress acting upon an elastic thread drawn from an elastic thread package, and a drive roll configured to supply the elastic thread dispensed from the tension controller to a processing line. The drive roll operates at a supply velocity slower than a conveyance velocity of a web, and increases or decreases the supply velocity depending on the fluctuation in the conveyance velocity.
Claims11
An elastic thread supply device configured to supply an elastic thread to a processing line, by overend unwinding for sequential drawing of the elastic thread in an axial core direction of a cylindrical elastic thread package around which the elastic thread is wound, comprising:
- a stress control unit configured to control the stress acting upon the elastic thread drawn from the elastic thread package;
- and
- a drive roll configured to supply the elastic thread dispensed from the stress control unit, to the processing line, wherein
- the stress control unit is configured to control the stress acting upon the elastic thread such that the stress becomes lesser than the stress acting upon the elastic thread in the processing line, and
- the drive roll is configured to, by operating at a supply velocity slower than a conveyance velocity of an article to be conveyed that is conveyed in the processing line, supply the elastic thread to the processing line such that the elastic thread attains a predetermined percentage of stretch between the drive roll and the processing line, and also, increase or decrease the supply velocity depending on a fluctuation in the conveyance velocity;
- wherein the drive roll is arranged downstream of the stress control unit, between the stress control unit and the processing line.
An elastic thread supply device configured to supply an elastic thread to a processing line, by overend unwinding for sequential drawing of the elastic thread in an axial core direction of a cylindrical elastic thread package around which the elastic thread is wound, comprising:
- a stress control unit configured to control the stress acting upon the elastic thread drawn from the elastic thread package;
- and
- a drive roll configured to supply the elastic thread dispensed from the stress control unit, to the processing line, wherein
- the stress control unit is configured to control the stress acting upon the elastic thread such that the stress becomes lesser than the stress acting upon the elastic thread in the processing line, and
- the drive roll is configured to, by operating at a supply velocity slower than a conveyance velocity of an article to be conveyed that is conveyed in the processing line, supply the elastic thread to the processing line such that the elastic thread attains a percentage of stretch between the drive roll and the processing line, and also, increase or decrease the supply velocity depending on a fluctuation in the conveyance velocity,
- the elastic thread supply device further comprising:
- an additional drive roll provided between the drive roll and the processing line, and configured to operate at a velocity different from the supply velocity of the drive roll and the conveyance velocity,
- wherein the additional drive roll is configured to operate at a velocity higher than the supply velocity of the drive roll, and lower than the conveyance velocity.
An elastic thread supply device configured to supply an elastic thread to a processing line, by overend unwinding for sequential drawing of the elastic thread in an axial core direction of a cylindrical elastic thread package around which the elastic thread is wound, comprising:
- a stress control unit configured to control the stress acting upon the elastic thread drawn from the elastic thread package;
- and
- a drive roll configured to supply the elastic thread dispensed from the stress control unit, to the processing line, wherein
- the stress control unit is configured to control the stress acting upon the elastic thread such that the stress becomes lesser than the stress acting upon the elastic thread in the processing line, and
- the drive roll is configured to, by operating at a supply velocity slower than a conveyance velocity of an article to be conveyed that is conveyed in the processing line, supply the elastic thread to the processing line such that the elastic thread attains a percentage of stretch between the drive roll and the processing line, and also, increase or decrease the supply velocity depending on a fluctuation in the conveyance velocity,
- the elastic thread supply device further comprising:
- an additional drive roll provided between the drive roll and the processing line, and configured to operate at a velocity different from the supply velocity of the drive roll and the conveyance velocity,
- wherein the additional drive roll is configured to operate at a velocity higher than the conveyance velocity.
Dependencies are inferred from the claim text.