3797371

Information

• Patent Grant
• 3797371

• References
• Source

• Patent Number

  3,797,371

• Date Filed

  Not available

• Date Issued

  Tuesday, March 19, 1974
  50 years ago

• CPC

  • B31B1/42 - acting externally
  • B31B1/12 - by air pressure or suction
  • B31B2201/0211 - involving air pressure or vacuum
  • B31B2201/265 - acting externally
  • B31B2203/003 - Making collapsible boxes Making boxes being in a collapsed condition at least during some of the manufacturing steps
  • B31B2203/082 - Making boxes from tubular webs or blanks, including tube or bottom forming operations

• US Classifications

  • 493 - Manufacturing container or tube from paper