Current as of: June, 1999
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Internet Version by PATENTEC © 1999      Terms of Use


411  DF  .~> Cyclic material reserve (e.g., irregularly shaped take-up)
412  DF  .~> Take-up coil drive control {4}
416  DF  .~> Supply controlled {6}


Classification: 242/410


(under the class definition) Apparatus or corresponding method for either: (a) regulating the longitudinal stress (tension) in an indefinite length of running material, or (b) retarding or selectively stopping rotation of a coiled material.

(1) Note. Stress regulation includes longitudinal tension added or subtracted by: (a) retardation or drag added to a supply, (b) adjusting supply and take-up rates to maintain tension within desired limits, or (c) temporarily storing material in a reserve formation during an abundance of supply or shortage of demand.

(2) Note. Stress regulation as used here excludes: (a) incidental tensioning created by contact of moving material with a static element such as a guide unless the element is explicitly provided to create tension (e.g., by special surface, tortuous course, etc.), (b) braking incidental to a

specified manufacturing or materials handling operation such as splicing, cutting, stamping, reciprocal feeding, etc., (c) a brake applied to the material for the purpose of completely halting movement, or (d) a device to create appreciable lasting tension in an article (e.g., prestressed concrete, pressure vessel, etc.).

(3) Note. This subclass is the locus for a positive brake applied to a spool or other coil holder of a winding or unwinding device not specifically provided for earlier in this schedule.

(4) Note. Where a tensioner is claimed with no significant structure but merely in terms of the composition of material of which it is composed, the tensioner will be classified as a brake subcombination or in the appropriate composition or material class.


28, Textiles: Manufacturing, 194, for tensioning threads being wound onto a warp beam (elongated take-up).

29, Metal Working,

452, for tensioning material in a manufacturing operation.

66, Textiles: Knitting, particularly

126, 130, 146, 151, and 158 for a strand tensioner in a specified knitting process or apparatus.

74, Machine Element or Mechanism,

575+, for pawl and ratchet structure as a subcombination or in combination with generalized structure.

87, Textiles: Braiding, Netting, and Lace Making,

61, for a tension device combined with a braiding or related machine.

112, Sewing,

254, and 255 for a tensioner combined with a specific sewing process or apparatus.

118, Coating Apparatus, 33, for a tensioner combined with material coating means.

139, Textiles: Weaving,

200, 201, and 212+ for a tensioning means associated with a weft supply apparatus.

188, Brakes, appropriate subclasses for general purpose braking, particularly

64, 65.1 for strand brakes capable of halting strand movement.

192, Clutches and Power-Stop Control, for devices regulating the transfer of drive power in various applications.

200, Electricity: Circuit Makers and Breakers,

61.13+, for a circuit maker/breaker specially designed for operation by a running web or strand, spool, or guide.

226, Advancing Material of Indeterminate Length, particularly

37+, and 195 for a tensioner combined with a feeder that may include a nominal material coil.

250, Radiant Energy, for a detail of a photoelectric device, per se, or in combination with generalized structure, particularly 200+, and 559.01.

254, Implements or Apparatus for Applying Pushing or Pulling Force, particularly

267, 277 for a tension control in a winch or hoist.

303, Fluid-Pressure and Analogous Brake Systems, for general purpose retarding devices associated with a fluid pressure regulator.

318, Electricity: Motive Power Systems, appropriate subclasses, especially

6, 7, and 362+ for tensioning and brakes of various uses.