Cushioning material

• US 3,231,454 A
• Filed: 04/14/1961
• Issued: 01/25/1966
• Est. Priority Date: 04/14/1961
• Status: Expired due to Term

• Current Assignee: Joseph Williams Robert
• Original Assignee: Joseph Williams Robert
• Inventors: JOSEPH WILLIAMS ROBERT
• Application Number:
  US04/103,144
• Time in Patent Office: 1,747 Days
• US Class Current: 428/132
• CPC Class Codes: B65D 81/03 Wrappers or envelopes with shock-absorbing properties, e.g. bubble films for thermal insulating purposes B65D81/3888
• CPC Class Codes: F16F 9/0481 provided in an opening to the exterior atmosphere
• CPC Class Codes: Y10S 297/02 Molded
• CPC Class Codes: Y10S 297/03 Pneumatic
• CPC Class Codes: Y10S 297/08 Inflatable bellows
• CPC Class Codes: Y10T 428/24281 Struck out portion type
• CPC Class Codes: Y10T 428/24298 Noncircular aperture [e.g., slit, diamond, rectangular, etc.]
• CPC Class Codes: Y10T 428/24322 Composite web or sheet
• CPC Class Codes: Y10T 428/24562 Interlaminar spaces
• CPC Class Codes: Y10T 428/24628 Nonplanar uniform thickness material
• CPC Class Codes: Y10T 428/24661 Forming, or cooperating to form cells

Claims

1. A CUSHIONING MATERIAL COMPRISING A FIRST SHEET OF RESILIENT THERMOPLASTIC FILM MATERIAL OF THE TYPE CHARACTERIZED BY ITS RETENTION OF A STATIC CHARGE, SAID FIRST SHEET HAVING A PLURALITY OF GENEREALLY FRUSTO-CONICAL HOLLOW PROJECTIONS FORMED THEREIN, ALL OF SAID PROJECTIONS PROJECTING OUTWARDLY FROM ONE SIDE OF SAID SHEET IN THE SAME DIRECTION AND INCLUDING A FRUSTO-CONICAL SIDE WALL PORTION AND A PLANAR END WALL PROTION, MEANS DEFINING A FLOW RESTRICTING VENT OPENING IN SAID PLANAR END PORTION OF SAID PROJECTIONS, AND A SECOND SHEET FORMED OF A THERMOPLASTIC FILM MATERIAL ALSO HAVING STATIC CHARGE RETENTION CHARACTERISTICS, SAID SECOND SHEET BEING DISPOSED IN CONTACT WITH THE OTHER SIDE OF SAID FIRST SHEET WHEREBY A PLURALITY OF AIR POCKETS ARE DEFINED BETWEEN SAID FIRST AND SECOND SHEETS BY SAID HOLLOW PROJECTIONS, SAID FIRS T AND SECOND SHEETS BEING ATTRACTED TO EACH OTHER BY THEIR RETAINED STATIC CHARGES.

2. A CUSHIONING MATERIAL AS CLAIMED IN CLAIM 1, WHEREIN SAID SECOND SHEET HAS A PLURALITY OF GENERALLY FRUSTO-CONICAL HOLLOW PROJECTIONS FORMED THEREIN, ALL OF SAID LASTMENTIONED PROJECTIONS PROJECTING OUTWARDLY FROM ONE SIDE OF SAID SECOND SHEET IN THE OPPOSITE DIRECTION AS SAID PROJECTIONS ON SAID FIRST SHEET.