Process for closing containers and foil membrane therefor

Details Process for closing containers and foil membrane therefor Process for closing containers and foil membrane therefor

1979-06-29

1981-04-28

Coan, James F.

Manufacturing container or tube from paper; or other manufacturi

Container making

Rigid container

493135, 493153, 156 69, 156272, 219 1043, B31B 166, B31B 172

Patent

active

042643163

ABSTRACT:
A container having a generally rectangular rim surrounding its opening is closed by a foil membrane that extends over the rim and is sealed to the rim by inductively heating it. The membrane does not correspond in configuration to the rim, but instead its side and end margins curve away from the sides and ends, respectively, of the container rim, so that the peripheral margin of the membrane is located closer to the container rim at the corners of the rim than at the sides or ends of the rim. The foil of the membrane is coated with a resin bonding material, and when the membrane is placed in a rapidly oscillating magnetic field, its foil is inductively heated throughout the entire area that overlies the rim, thereby rendering the bonding material plastic and establishing a uniform bond between the rim and membrane. In contrast, a membrane having the same generally rectangular configuration as the rim will bond to the sides and ends of the rim, but not to the corners without overheating the membrane, since a membrane of that configuration does not heat uniformly in an oscillating magnetic field.

REFERENCES:
patent: 3690091 (1972-09-01), Christensson
patent: 3808074 (1974-04-01), Smith et al.
patent: 4017704 (1977-04-01), Collins et al.
patent: 4095390 (1978-06-01), Knudsen
patent: 4144433 (1979-03-01), Zelahy et al.

Affiliated with

Also associated with

Rating

Process for closing containers and foil membrane therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for closing containers and foil membrane therefor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for closing containers and foil membrane therefor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-862020