US PATENT SUBCLASS 425 / 289
PREFORM SEVERING MEANS

Current as of: June, 1999
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425 /   HD   PLASTIC ARTICLE OR EARTHENWARE SHAPING OR TREATING: APPARATUS

289PREFORM SEVERING MEANS {10}
290  DF  .~> Severing means is perforator {1}
292  DF  .~> Cutter guided by or cooperating with peripheral edge of female mold {1}
294  DF  .~> Rotating means comprising circumferentially extending cutting and shaping channels coacting with a roll or platen having complementary channels
295  DF  .~> Cutter guided by a template or a pattern
296  DF  .~> Means for forming from bulk material, means for severing and means for reshaping {1}
298  DF  .~> Configuration of cutting implement providing shaping cavity {2}
301  DF  .~> Diverse severing means
302.1  DF  .~> Serially arranged with preform reshaping means {3}
306  DF  .~> Plural distinct cutters {1}
308  DF  .~> Means forming from bulk and downstream severing means {3}

DEFINITION

Classification: 425/289

(under the class definition) Apparatus comprising means to (1) completely remove a portion of a preform from the remainder thereof, (2) form a hole or opening in a preform which extends completely therethrough or, (3) partially disjoin a portion of a preform from the remainder by severing the preform through its entire thickness in a direction extending from one edge toward another edge and allowing the severed portions to remain attached to each other.

(1) Note. To be included herein under part (3) of the above definition the intent must be to disassociate the preform in the severed area and not merely to rearrange or reshape the preform by forming a depression or surface deformation therein. For example, forming depressions or decorations in the edge of a brick or concrete building block without removing any material, even though done with a sharp knife-like element, is not severing.

(2) Note. The severing need not be done by a sharp knife-like implement, but may be accomplished, for example, by breaking, heating, tearing, etc..

(3) Note. Included herein are devices for severing and simultaneously reshaping as well as devices wherein the

severing and the molding are accomplished sequentially.

(4) Note. The severing of a parison prior to blow molding is not within the scope of this subclass; for such patents see subclasses 324+.

SEE OR SEARCH THIS CLASS, SUBCLASS: 94, for means applying a parting or other nonmolding material to a cutter, harvesting blade or scores.

106, for molding and cutting combined with a coating means.

142, for cutter control means operated by means responsive to a condition or variable.

164, for electrical control of severing means for a product.

202, for cutting means in combination with means to agitate, knead or other wise mix the cut or comminuted material.

218, for a female mold and means to remove excess stock or to smooth stock prior to the stock being formed or set up.

232, for means for cleaning a cutter or knife element.

238+, for dough divider type devices including a trap chamber.

806, for a cross-reference collection of disclosures on flash removing means.

SEE OR SEARCH CLASS

65, Glass Manufacturing,

174+, for cutting means for glass preform or products. 82, Turning,

46+, for patents claiming cutter, per se, being brought into engagement with the exterior of a rotating workpiece or to trim or cut away portions of the work piece.

83, Cutting, especially

467+, for a cutter of the class type which cuts material to a desired length.

157, Wheelwright Machines,

13, for grooving, slitting and/or lacerating of rubber tires.

164, Metal Founding,

262, for metal founding apparatus including product severing

or trimming means.

225, Severing by Tearing or Breaking, appropriate subclasses for a process or apparatus for severing by tearing or breaking.