Manufacture of flat inflatable objects

• US 2,703,770 A
• Filed: 04/15/1952
• Issued: 03/08/1955
• Est. Priority Date: 04/15/1952
• Status: Expired due to Term

• Current Assignee: Jean Melzer
• Original Assignee: Jean Melzer
• Inventors: Melzer, Jean
• Application Number:
  US03/282,360
• Time in Patent Office: 1,057 Days
• US Class Current: 5/710
• CPC Class Codes: B29C 65/00 Joining or sealing of preformed parts , e.g. welding of plastics materials; Apparatus therefor general aspects of processes or apparatus for joining preformed parts B29C66/00; using porous material formed by internal pressure generated therein for joining preformed parts B29C44/1228, B29C44/326
• CPC Class Codes: B29C 65/02 by heating, with or without pressure
• CPC Class Codes: B29C 65/04 Dielectric heating, e.g. high-frequency welding , i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
• CPC Class Codes: B29C 66/004 Preventing sticking together, e.g. of some areas of the parts to be joined
• 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 66/1312 Single flange to flange joints, the parts to be joined being rigid the parts to be joined being flexible B29C66/133
• CPC Class Codes: B29C 66/21 said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
• CPC Class Codes: B29C 66/24221 being circular B29C66/51 takes precedence
• CPC Class Codes: B29C 66/43 Joining a relatively small portion of the surface of said articles B29C66/45 takes precedence
• CPC Class Codes: B29C 66/436 Joining sheets for making articles comprising cushioning or padding materials, the weld being performed through the cushioning material, e.g. car seats joining through openings B29C66/304
• CPC Class Codes: B29C 66/439 Joining sheets for making inflated articles without using a mould
• CPC Class Codes: B29C 66/472 said single elements being substantially flat
• CPC Class Codes: B29C 66/71 characterised by the composition of the plastics material of the parts to be joined welding bar compositions B29C65/125
• CPC Class Codes: B29C 66/8322 Joining or pressing tools reciprocating along one axis
• CPC Class Codes: B29C 66/843 Machines for making separate joints at the same time in different planes; Machines for making separate joints at the same time mounted in parallel or in series
• CPC Class Codes: B29D 22/02 Inflatable articles
• CPC Class Codes: B29K 2027/06 PVC, i.e. polyvinylchloride
• CPC Class Codes: B29L 2022/02 Inflatable articles balls B29L2031/54 ; inner tyres B29L2023/245
• CPC Class Codes: B29L 2031/751 Mattresses, cushions upholstery B29L2031/58
• CPC Class Codes: B32B 3/12 characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
• CPC Class Codes: Y10T 29/49879 : Spaced wall tube or receptacle
• CPC Class Codes: Y10T 428/24331 : including nonapertured component
• CPC Class Codes: Y10T 428/24826 : Spot bonds connect components

Claims

1. THE METHOD OF PRODUCING AN INFLATABLE STRUCTURE FROM THREE OR MORE LAYERS OF PLASTIC SHEETS, WHICH COMPRISES INTERMITTENTLY APPLYING LOCAL SEALING PRESSURE TO A STACK OF THE SHEETS AT A NUMBER OF MUTUALLY SPACED POINTS, ADVANCING THE STACK IN THE INTERMEDIATE INTERVALS RELATIVE TO THE POINTS OF PRESSURE APPLICATION SO AS TO INCREMENTALLY DISTRIBUTE A MULTITUDE OF SPOT SEALS OVER THE DESIRED STACK AREA, AND ALTERNATELY PLACING FOIL-SEPARATING INSERTS AT THE PRESSURE POINTS TEMPORARILY BETWEEN ONE GROUP OF MUTUALLY ADJACENT SHEETS DURING ONE PRESSING OPERATION AND TEMPORARILY BETWEEN ANOTHER GROUP OF ADJACENT SHEETS DURING THE NEXT PRESSING OPERATION WHEREBY DIFFERENT GROUPS OF SHEETS ARE SEALED TOGETHER AT DIFFERENT SUCCESSIVE SPOTS RESPECTIVELY.

3. AN INFLATABLE STRUCTURE COMPOSED OF PLASTIC SHEETS AND COMPRISING TWO OUTER NON-PERFORATED SHEETS, AT LEAST ONE INNER SHEET HAVING DISTRIBUTED PERFORATIONS, SAID SHEETS BEING DISPOSED UPON EACH OTHER, EACH PAIR OF MUTUALLY ADJACENT SHEETS BEING SEALED TOGETHER AT A NUMBER OF SPOTS AROUND RESPECTIVE PERFORATIONS AND EACH TWO SUCCESSIVE ONES OF SAID SPOTS BEING SPACED FROM EACH OTHER BY A SEAL-FREE PERFORATION, AND SAID SEAL-FREE PERFORATIONS OF ONE PAIR BEING SURROUNDED BY RESPECTIVE SEALS IN THE NEXT ADJACENT PAIR.