Plastic and nonmetallic article shaping or treating: processes – Direct application of electrical or wave energy to heat the... – Induction heating
Reexamination Certificate
1998-11-02
2001-10-30
Silbaugh, Jan H. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Direct application of electrical or wave energy to heat the...
Induction heating
C264S153000, C264S163000, C264S266000, C264S296000, C264S404000, C264S480000, C264S487000, C264S491000, C425S17480R, C156S219000, C156S220000, C156S251000, C156S274400, C156S277000
Reexamination Certificate
active
06309582
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a method for making insignias used as badges, chevrons, trademarks, or the like, and more particularly, to a method for making insignias with a raised design, which have a more prominent, distinctive and vivid appearance.
2. Description of Related Art
People usually attach insignias of special design on their clothing as an indication of something special, such as membership, authority or achievement. The insignias can also bear trademark designs symbolizing logos that are attached to fashionable goods such as jeans, purses and so on to promote their sales. The designs on insignias are usually made in relief so as to provide a more prominent, distinctive and vivid appearance. A conventional method for making insignias is to prepare a base sheet on which a decorative material shaped into a desired design is formed. A high-frequency heating machine is used to bond the decorative material on the base sheet and a mold having cutting blades is used to form the decorative material into a desired shape. After that, manual work is used to remove parts of the ornamental material that are cut away from the base sheet so as to form patterns on the insignia. The pattern on the insignia is pre-designed with the mold, which is made in advance according to customer specifications.
A conventional method for making insignias with raised designs is disclosed in U.S. Pat. No. 5,143,672, by Kuwahara, entitled “
Method for Forming Emblem of Thermoplastic Synthetic Resin Film
”. The mechanism used to perform this method includes an engraving die having one or more fusion cutters thereon for pressing the film. During the pressing process, the film is high-frequency-induction heated by the engraving die such that it is partly melted away and thus reduced in thickness to allow the base to be visible through the film. This method is capable of forming fine patterns on the emblem. However, one drawback to this method is that it is still unable to form highly texturized patterns on the emblem. During the heating process of this method, the thermoplastic synthetic resin film is pressed to form recessed portions and raised portions that constitute a visually 3-D pattern on the emblem. However, the 3-D pattern is roughly formed and is thus still considered a plane pattern.
Moreover, the heating process of Kuwahara's method is carried out by high-frequency-induction. One drawback to this heating process is that the heat generated by the high-frequency-induction heating is not enough to treat thick base material. Therefore, the method can only be used to form thin emblems and cannot be used to form thick emblems.
Roughly speaking, under the condition that the heating temperature is fixed, the fineness of the pattern on the emblem is decreased as the thickness of the emblem is increased. The use of only the high-frequency-induction heating means to heat the emblem usually causes the formation of rough, fuzzy patterns on the emblem. Moreover, the edges of the emblem cut by the cutters are fluffy. With these drawbacks, the method is still unable to make highly texturized 3-D patterns on emblems.
SUMMARY OF THE INVENTION
It is therefore a primary objective of the present invention to provide a method for making insignias with raised designs by using a composite insulated heating device.
It is another objective of the present invention to provide a method for making insignias with fine and delicate patterns.
It is still another objective of the present invention to provide a method for making insignias with a prominent aesthetic appearance.
It is yet another objective of the present invention to provide a method by which the procedural steps for making an insignia are simplified.
In accordance with the foregoing and other objectives of the present invention, a new and improved method for making an insignia is provided. The method comprises the following steps of: (1) preparing a base material consisting of a base sheet and a surface sheet overlaying the base sheet, the base material being covered with a surface coating; (2) placing the base material between a bottom mold and an upper mold, the upper mold and/or bottom mold being coupled to a composite heating device including a high-frequency-induction heating device and an electric heating device, the upper mold being provided with a plurality of edge-defining blades near the edges, a plurality of pattern-defining blades which are shorter than the edge-defining blades, and a plurality of toothed surfaces which are formed with a plurality of pointed projections much shorter than the pattern-defining blades; (3) pressing the upper mold against the bottom mold so as to form the base material with a raised design of patterns, and meanwhile applying the composite heat to the bottom and upper molds from the high-frequency-induction heating device and the electric heating device, whereby the edge-defining blades cut an edge for the insignia and the pattern-defining blades form a pattern on the insignia; and (4) removing remnants cut away by the pattern-defining blades.
REFERENCES:
patent: 3594457 (1971-07-01), Wright
patent: 3681170 (1972-08-01), Pevitt, Jr.
patent: 3711362 (1973-01-01), Ballard
patent: 4555373 (1985-11-01), Bloemkolk
patent: 5038468 (1991-08-01), Wanatowicz
patent: 5143672 (1992-09-01), Kuwahara
patent: 5599416 (1997-02-01), Kuwahara
patent: 5813772 (1998-09-01), Magill et al.
patent: 851703 (1960-10-01), None
Green Bradford
Poe Michael I.
Silbaugh Jan H.
Ware Fressola Van der Sluys & Adolphson LLP
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