Heated rollers
First Claim
1. In a heated roller having an axis of rotation, a generally-cylindrical outer shell, a primary heating coil between the shell and the axis of rotation and radially spaced from the axis of rotation and a head at the end of the shell, the improvement wherein:
- the head has an integral roller support shaft protruding therefrom, a cylindrical boss supporting the end of the shell and a helix groove around the boss;
an auxiliary heating coil is in the groove and is confined between the boss and the shell end,whereby the end of the roller may be temperature-controlled independently of the shell temperature.
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Accused Products
Abstract
The disclosure involves a heated roller having a generally-cylindrical outer shell, a primary heating coil between the shell and a roller head at the end of the shell. In the improvement, the head includes an independently-controlled (or controllable) auxiliary heating coil so that the end of the roller may be temperature-controlled independently of the shell. The user may thereby "tailor" the temperature profile of the roller to suit a wide variety of applications. In specific embodiments, the auxiliary coil has the same or differing pitch along its length and/or the cable from which the coil is made has the same or differing wattage output per unit of cable length. A heating roller in combination with a transfer cylinder for a heat transfer decorating system is also disclosed.
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Citations
17 Claims
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1. In a heated roller having an axis of rotation, a generally-cylindrical outer shell, a primary heating coil between the shell and the axis of rotation and radially spaced from the axis of rotation and a head at the end of the shell, the improvement wherein:
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the head has an integral roller support shaft protruding therefrom, a cylindrical boss supporting the end of the shell and a helix groove around the boss; an auxiliary heating coil is in the groove and is confined between the boss and the shell end, whereby the end of the roller may be temperature-controlled independently of the shell temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. In a heated roller having an axis of rotation, a generally-cylindrical outer shell, a primary heating coil between the shell and the axis of rotation and radially spaced from the axis of rotation and a head at the end of the shell, the improvement wherein:
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the head has an integral roller support shaft protruding therefrom, a cylindrical boss supporting the end of the shell; the boss includes a face generally perpendicular to the axis of rotation; a spiral groove is formed in the faces; a spiral auxiliary heating coil is in the groove and is confined between the boss and the shell end, whereby the end of the roller may be temperature-controlled independently of the shell temperature. - View Dependent Claims (12)
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13. In a heated roller having (a) spaced-apart roller ends, (b) first and second closure heads, each mounted at a respective one of the roller ends, (c) an axis of rotation, (d) a generally-cylindrical outer shell and (e) a heating coil lodged in a groove between the shell and the axis of rotation, the improvement wherein:
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the coil is a helix coil spaced from and wound around the axis of rotation, has a pitch and a span length measured parallel to the axis of rotation and includes a plurality of turns of heating cable; each successive turn of the said plurality of turns is closer to the second head and farther from the first head; the pitch of the coil is substantially uniform along the span length; the cable includes a first cable portion having a first wattage output per unit of length of the first cable portion; the cable includes a second cable portion having a second wattage output per unit of length of the second cable portion; the second wattage output per unit length is lower than the first wattage output per unit length; the first cable portion is between the end and the second cable portion. - View Dependent Claims (14)
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15. In a heated roller having an axis of rotation, a generally-cylindrical outer shell, a primary heating coil between the shell and the axis of rotation and a head at the end of the shell, the improvement wherein:
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the head includes an auxiliary heating coil having a pitch and a span length measured parallel to the axis of rotation and includes a plurality of turns of heating cable; the pitch of the auxiliary coil is substantially uniform along the span length; the cable includes a first cable portion having a first wattage output per unit of length of the first cable portion; the cable includes a second cable portion having a second wattage output per unit of length of the second cable portion; and the second wattage output differs from the first wattage output. - View Dependent Claims (16)
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17. In a heated roller having an axis of rotation, a generally-cylindrical outer shell, a primary heating coil between the shell and the axis of rotation and a head at the end of the shell, the improvement wherein:
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the head includes an auxiliary heating coil having a pitch and a span length measured parallel to the axis of rotation and includes a plurality of turns of heating cable; the pitch of the auxiliary coil varies along the span length; the cable includes a first cable portion having a first wattage output per unit of length of the first cable portion; the cable includes a second cable portion having a second wattage output per unit of length of the second cable portion; and the second wattage output differs from the first wattage output.
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Specification