Method and apparatus for applying bonding pressures of differing magnitudes to adjacent surfaces of a workpiece

• US 3,305,420 A
• Filed: 12/19/1963
• Issued: 02/21/1967
• Est. Priority Date: 12/19/1963
• Status: Expired due to Term

• Current Assignee: Jack L. Ritchey, Stanley Steed, Winston E. Brownlee
• Original Assignee: Jack L. Ritchey, Stanley Steed, Winston E. Brownlee
• Inventors: Brownlee, Winston E., Ritchey, Jack L., Steed, Stanley
• Application Number:
  US04/331,725
• Time in Patent Office: 1,160 Days
• US Class Current: 156/217
• CPC Class Codes: B29C 43/3642 Bags, bleeder sheets or cauls for isostatic pressing
• CPC Class Codes: B29C 63/16 applied by "rubber" bag or diaphragm
• CPC Class Codes: B29C 65/48 using adhesives , i.e. using supplementary joining material; solvent bonding
• CPC Class Codes: B29C 65/483 Reactive adhesives, e.g. chemically curing adhesives
• CPC Class Codes: B29C 66/1122 Single lap to lap joints, i.e. overlap joints B29C66/45, B29C66/472, B29C66/52272 take precedence
• CPC Class Codes: B29C 66/1222 comprising at least a lapped joint-segment
• CPC Class Codes: B29C 66/1224 comprising at least a butt joint-segment
• CPC Class Codes: B29C 66/5326 said single elements being substantially flat
• CPC Class Codes: B29C 66/54 Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
• CPC Class Codes: B29C 66/723 being multi-layered B29C66/7292, B29C66/72941 take precedence
• CPC Class Codes: B29C 66/727 being porous, e.g. foam
• CPC Class Codes: B29C 66/81455 being a fluid inflatable bag or bladder, a diaphragm or a vacuum bag for applying isostatic pressure inflatable element positioned between the joining tool and a backing-up part B29C66/82421
• CPC Class Codes: B29D 99/0025 Producing blades or the like, e.g. blades for turbines, propellers, or wings
• CPC Class Codes: B29L 2031/3085 Wings
• CPC Class Codes: B64C 27/473 Constructional features
• CPC Class Codes: B64F 5/10 Manufacturing or assembling aircraft, e.g. jigs therefor
• CPC Class Codes: Y10T 156/1036 Bending of one piece blank and joining edges to form article
• CPC Class Codes: Y10T 156/1049 Folding only
• CPC Class Codes: Y10T 156/1077 Applying plural cut laminae to single face of additional lamina

Claims

5. THE METHOD OF PRODUCING AN INFLATABLE TOOL FOR APPLYING A PLURALITY OF DIFFERING PRESSURES TO SURFACES FOR ADHESIVE BONDING AND THE LIKE, COMPRISING THE STEPS OF CUTTING AN INTERNAL PATTERN OF FLEXIBLE-EDGED FLAT MATERIAL HAVING ONE NON-ADHERENT SURFACE, CUTTING A FIRST LAMINATE OF UNCURED VULCANIZABLE PLY MATRIAL OF SUBSTANTIALLY TWICE THE WIDTH OF SAID INTERNAL PATTERN, PLACING SAID INTERNAL PATTERN UPON AND WITHIN THE WIDTH OF SAID FIRST LAMINATE WITH SAID ADHERENT SURFACE AGAINST SAID FIRST LAMINATE SO AS TO LEAVE FIRST MARGINAL PORTIONS ALONG BOTH EDGES OF THE PATTERN, PLACING A FIRST FLAT PRESSURE BAG UPON SAID NON-ADHERENT SURFACE OF SAID INTERNAL PATTERN AT A PREDETERMINED LOCATION, FOLDING SAID FRIST MARGINAL PORTIONS FO SAID FIRST LAMINATE ALONG THE EDGES OF SAID FIRST PATTERN AND OVER SAID NON-ADHERENT SURFACE AND SAID FIRST FLAT PRESSURE BAG AND JOINING THE EDGES OF SAID FRIST LAMINATE, CUTTING A SECOND SIMILAR LAMINATE SUFFICIENTLY LARGER THAN SAID FIRST LAMINATE SO AS TO OVERLAP IT, PLACING THE JOINT OF SAID FRIST LAMINATE WITHIN THE WIDTH OF SAID SECOND LAMINATE SO AS TO LEAVE SECOND MARGINAL PORTIONS ON BOTH SIDES OF SAID INNERMOST LAYER, FOLDING SAID SECOND MARGINAL PORTIONS OVER SAID INNERMOST LAYER AND JOINING THE EDGES OF SAID SECOND MARGINAL PORTIONS, CLOSING BOTH ENDS OF THE LAYERS SO FORMED TO PROVIDE A SECOND PRESSURE BAG, INSERTING AIR INLETS AT THE ENDS OF SAID FIRST AND SECOND PRESSURE BAGS AND EXTENDING THROUGH THE RESPECTIVE INNERMOST LAYERS, AND VULCANIZING THE COMBINATION SO FORMED TO ADHERENTLY BOND SAID FIRST PRESSURE BAG TO THE INNERMOST LAYER OF SAID SECOND PRESSURE BAG.