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US 2015/0292127 A1Published application
Drawing device and drawing method
AssigneeKuraray Co., Ltd.
InventorsHideki KAMADA, Teruyuki ITAMI, Toshiaki IKIMINE, Yohei NISHIUMI, Shohei SHIBATA, Toshiji KASHIWAGI
Life of this patent
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Abstract
A drawing device for drawing a drawable material, the drawing device comprising at least a pair of tapered rollers each having a taper ratio in a range of 0.035 to 0.50, wherein the taper ratio is represented by (β−α)/2L, where β denotes a maximum diameter of the roller, α denotes a minimum diameter of the roller, and L denotes a length of a tapered portion of the roller.
Claims19
A drawing device for drawing a drawable material, the drawing device comprising
- at least a pair of tapered rollers each having a taper ratio in a range of 0.035 to 0.50,
- wherein the taper ratio is represented by (β−α)/2L,
- where β denotes a maximum diameter of the roller, α denotes a minimum diameter of the roller, and L denotes a length of a tapered portion of the roller.
A drawing method for a drawable material, comprising:
- spanning a pair of rollers of a drawing device with a drawable material, the device including at least the pair of tapered rollers each having a taper ratio represented by (β−α)/2L in a range of 0.035 to 0.50, where β denotes a maximum diameter of the roller, α denotes a minimum diameter of the roller, and L denotes a length of a tapered portion of the roller;
- and
- drawing the drawable material by running the drawable material while spanning the rollers with the drawable material a plurality of times from a small-diameter side of the tapered rollers to a large-diameter side of the tapered rollers.
Dependencies are inferred from the claim text.