Method and apparatus for making dual-lip seals

• US 3,341,647 A
• Filed: 10/14/1963
• Issued: 09/12/1967
• Est. Priority Date: 10/14/1963
• Status: Expired due to Term

• Current Assignee: Douglas J. Aberle
• Original Assignee: Douglas J. Aberle
• Inventors: Aberle, Douglas J.
• Application Number:
  US04/315,808
• Time in Patent Office: 1,429 Days
• US Class Current: 264/325
• CPC Class Codes: B29D 99/0053 Producing sealings B29D99/0085 takes precedence
• CPC Class Codes: B29K 2021/00 Use of unspecified rubbers as moulding material
• CPC Class Codes: B29L 2031/26 Sealing devices, e.g. packaging for pistons or pipe joints
• CPC Class Codes: Y10S 425/025 Gutter
• CPC Class Codes: Y10S 425/047 Seal ring
• CPC Class Codes: Y10S 425/812 Venting

Claims

7. A METHOD OF MOLDING ELASTOMERIC MEMBERS IN A PLURAL-ELEMENT MOLD HAVING A MOLD CAVITY THAT PROVIDES SHARP EDGES BETWEEN TWO STATIONARY PARTS OF THE MOLD, COMPRISING:

CLOSING SAID MOLD UPON UNCURED ELASTOMER SO AS TO DEFORM IT AND DEVELOP HYDRAULIC PRESSURE BY THE DEFORMATION, EMPLOYING SAID ELASTOMER AND ITS HYDRAULIC PRESSURE TO DRIVE THE AIR IN SAID CAVITY INTO A CORNER THEREIN AT ONE OF SAID SHARP EDGES, DRIVING THE AIR OUT BETWEEN THE SAID STATIONARY PARTS AT SAID EDGE, EMPLOYING SAID ELASTOMER TO FORCE AT LEAST ONE OF SAID TWO STATIONARY PARTS TO MOVE TOWARD THE OTHER ONE AND THEREBY TIGHTEN THE GAP BETWEEN SAID STATIONARY PARTS TO SEAL SAID EDGE AGAINST PASSAGE OF ELASTOMER AND FILL SAID CAVITY, AND CURING SAID ELASTOMER IN SAID MOLD.