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US 4,374,796 AGranted
Method for loading cosmetic material into hollow space
AssigneesShiseido Company, Ltd., Yoshida Industry Co., Ltd.
InventorsHirotake Ogasawara, Yoshiharu Hatakeyama, Mitsuo Ishiguro
Life of this patent
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Abstract
Cosmetic material prepared by mixing powder cosmetic material with a binder and solvent is injected under a predetermined pressure into a hollow closed space partially defined by a porous absorbing material, whereby the solvent in the cosmetic material is absorbed into the absorbing material and the powder cosmetic material is solidified in the hollow closed space.
Claims11
A method of molding a cosmetic material, said method comprising:
- (a) preparing a fluent mixture of cosmetic material by mixing powder cosmetic material with a binder and a solvent;
- (b) providing a mold structure having therein a mold cavity partially defined by a porous absorbing material and partially defined by a casing structure;
- (c) injecting said mixture of cosmetic material under a predetermined pressure into said mold cavity and filling said mold cavity;
- (d) maintaining said pressure for a time period after said mold cavity is filled with said mixture of cosmetic material;
- (e) absorbing said solvent from said mixture of cosmetic material into said porous absorbing material and thereby causing a bonding of said powder cosmetic material in a solid molded shape;
- and
- (f) separating said porous absorbing material from said molded cosmetic material and from said casing structure, thereby retaining said molded cosmetic material in said structure.
4 more elements
Dependencies are inferred from the claim text.