3221612

Information

• Patent Grant
• 3221612

• References
• Source

• Patent Number

  3,221,612

• Date Filed

  Not available

• Date Issued

  Tuesday, December 7, 1965
  59 years ago

• CPC

  • B65H75/14 - with two end flanges
  • B65H2701/511 - essentially made of sheet material
  • B65H2701/5112 - Paper or plastic sheet material
  • Y10S493/954 - Spool
  • Y10T29/4949 - Material winding, e.g., reel, spool
  • Y10T29/49893 - Peripheral joining of opposed mirror image parts to form a hollow body

• US Classifications

  • 493 - Manufacturing container or tube from paper
  • 029 - Metal working
  • 242 - Winding, tensioning, or guiding