3834639

Information

• Patent Grant
• 3834639

• References
• Source

• Patent Number

  3,834,639

• Date Filed

  Not available

• Date Issued

  Tuesday, September 10, 1974
  50 years ago

• CPC

  • G03B17/30 - Locating spools or other rotatable holders of coiled film
  • B65H75/14 - with two end flanges
  • B65H75/22 - collapsible with removable parts
  • G03B27/22 - by stretching over a curved surface
  • B65H2701/5112 - Paper or plastic sheet material
  • B65H2701/51524 - Paperboard barrel
  • G03B2217/261 - Details of spools

• US Classifications

  • 242 - Winding, tensioning, or guiding