US PATENT SUBCLASS 249 / 175
CORE (INTERNAL MOLD)

Current as of: June, 1999
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249 /   HD   STATIC MOLDS

175CORE (INTERNAL MOLD) {5}
176  DF  .~> Plural spaced cores having community feature
177  DF  .~> Including means for attaching core to a support
178  DF  .~> Including means to expand or contract core {3}
183  DF  .~> Of resilient material capable of flexure to aid removal of core from product
184  DF  .~> Of plural sections {2}

DEFINITION

Classification: 249/175

(under the class definition) Apparatus, section C.

(1) Note. This and indented subclasses do not take means functioning to support a preform, for preform uniting even though said means inherently functions to obtain a shaped surface in the product, unless the patentee intends that the means be so used.

(2) Note. A core is differentiated from a plunger in that it is static, whereas a plunger is dynamic during the molding operation; e.g., both the core and plunger are used to make a hollow casting, but movement of the plunger forms the hollow portion of the product, whereas the core remains static to form the hollow portion.

SEE OR SEARCH THIS CLASS, SUBCLASS:

63, for mold with core and means to remove core.

122+, for plural article forming mold(s) having core(s).

142+, for container type mold having a removable core.

216+, for tie rod having shaping means and its adjuncts.

SEE OR SEARCH CLASS

65, Glass Manufacturing,

362, for a dynamic shaping plunger, per se.

156, Adhesive Bonding and Miscellaneous Chemical Manufacture,

414+, for tire body building drums, per se, disclosed for use in assembling and adhesively bonding of tire lamina.

164, Metal Founding,

365+, and 369+ for sand cores.

405, Hydraulic and Earth Engineering, appropriate subclasses for molding surfaces used as cores that become a permanent part of the product.