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 Title: |
US5481763:
Molded head harness
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Brostrom, Gerald M.; Burnsville, MN
Byram, David C.; River Falls, WI
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| Assignee: |
Minnesota Mining and Manufacturing Company, St. Paul, MN
other patents from MINNESOTA MINING AND MANUFACTURING COMPANY (377880) (approx. 9,335)
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| Published / Filed: |
1996-01-09
/ 1994-12-07
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| Application Number: |
US1994000350793
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| IPC Code: |
Advanced:
A62B 18/08;
IPC-7:
A62B 18/08;
B29D 5/00;
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| ECLA Code: |
A62B18/08B;
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| U.S. Class: |
Current:
002/452;
002/009;
128/207.11;
264/252;
Original:
002/452;
002/009;
128/207.11;
264/252;
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| Field of Search: |
002/009,11,452,173,181,209.13,410,424
128/201.22,201.23,201.24,201.25,201.29,206.12,206.24,206.27,206.28,207.11
264/252,275,279.1
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| Priority Number: |
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| Abstract: |
An insert-molded head harness for use in securing a respirator mask to the face of a wearer, wherein the head harness comprises a web having a central portion and a peripheral portion extending at least partially around the central portion, and a plurality of elastomeric fastening straps having first and second ends, the first ends being integrally bonded to the peripheral portion of the web and the second ends being adapted to be used in securing a respirator mask to the face of a wearer. The head harness can include an elastomeric flange which comprises an elastomeric resin and embeds the peripheral portion of the web. The web preferably comprises a material selected from the group consisting of woven, knitted, and non-woven materials.
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| Attorney, Agent or Firm: |
Griswold, Gary L. ;
Kirn, Walter N. ;
Truesdale, Carole ;
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| Primary / Asst. Examiners: |
Crowder, Clifford D.; Neas, Michael A.
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| Maintenance Status: |
E2 Expired Check current status
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Parent Case: |
This is a division of application Ser. No. 08/010,546 filed Jan. 28, 1993, now U.S. Pat. No. 5,394,565.
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| Designated Country: |
DE FR GB IT
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| Family: |
Show 8 known family members
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First Claim:
Show all 9 claims |
What is claimed is:
1. A process for making a head harness which is adapted for use in securing a respirator mask to the face of a wearer, comprising the steps of:
- a) inserting a moldable web into a mold, the web comprising a central portion and a peripheral portion extending at least partially around the central portion, the mold being adapted to receive the web as an insert and having a mold cavity shaped to permit the molding of a plurality of elastomeric fastening straps formed integrally with the peripheral portion of the web;
- b) positioning and securing the web within the mold so that the peripheral portion of the web can extend into the mold cavity during the molding process;
- c) clamping the blocks of the mold together at a suitable clamping pressure to thereby clamp the central portion of the web;
- d) contacting the peripheral portion of the web with a molten elastomeric resin in a quantity sufficient to embed the peripheral portion of the web in the molten resin and form a plurality of elastomeric fastening straps which are integral with the peripheral portion of the web;
- e) maintaining suitable pressure and temperature in the mold for a time sufficient to cure the resin and thereby form the head harness;
- f) releasing the clamping pressure of the mold blocks; and
- g) removing the head harness from the mold.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 77 U.S. patent(s) that reference this one
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