Granted Patent
Utility
US 4,606,784 · App. 06/438,648
Method and an arrangement for the folding and sealing of the longitudinal edge of a material web
Inventors:
Jan-Erik Glans, Henry Corneliusson
Patented Case
View Patent ↗
Granted: Aug 19, 1986
Filed: Nov 3, 1982
Inventors
Jan-Erik Glans
Henry Corneliusson
Assignee (at issue)
Tetra Pak International AB
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.