1838480

Information

• Patent Grant
• 1838480

• References
• Source

• Patent Number

  1,838,480

• Date Filed

  Not available

• Date Issued

  Tuesday, December 29, 1931
  93 years ago

• CPC

  • B31B21/00 - Machinery characterised by making rectangular envelopes or bags of flat form, i.e. without structural provision at the base for thickness of contents, from sheets or blanks
  • B31B19/62 - by adhesives
  • D21F5/00 - Dryer section of machines for making continuous webs of paper
  • B31B2219/6015 - Arrangements for permitting the glue to set
  • B31B2221/10 - the bags having no structural provision at the base for thickness of content

• US Classifications

  • 034 - Drying and gas or vapor contact with solids
  • 226 - Advancing material of indeterminate length