Methods of making metal can ends with plastics closures

Details Methods of making metal can ends with plastics closures Methods of making metal can ends with plastics closures

1988-07-08

1990-01-16

Marcus, Stephen

Receptacles

Closures

With closure opening arrangements for means

220270, 220271, 413 12, 413 25, B65D 1734

Patent

active

048937258

ABSTRACT:
A method of making a metal can end with a tear-open plastics closure, for a can intended to be resistant to leakage when subject to internal pressures, such as arise from carbonation of a beverage or thermal processing, wherein the undersurface of the can end is provided with a plastics coating, and the can end is pierced to form an aperture with a peripheral downturned flange at an angle of 70.degree. to 110.degree. to the plane of the can end and having a flat end. A one-piece ring pull closure is injection-moulded onto the can end from a plastics material resistant to softening at up to at least 65.degree. C., without additional heating of the metal, so as to fill the aperture, bond with the coating, and enclose the flange, with a residual thickness below the flange of 0.125 to 0.5 mm. The thickness of the plastics material of the closure is such that it can be sheared against the flange when the ring pull is pulled manually. The residual thickness of the plastics material may be varied around the aperture to increase resistance of the closure to creep, and the aperture may be pear-shaped or may be circular with a separate vent hole.

REFERENCES:
patent: 4170314 (1979-10-01), Weierman et al.
patent: 4309952 (1982-01-01), Takahishi et al.
patent: 4407424 (1983-10-01), Heyn
patent: 4489018 (1984-12-01), Ball
patent: 4576306 (1986-03-01), Kelsey et al.
patent: 4674649 (1987-06-01), Pavely

Affiliated with

Also associated with

Rating

Methods of making metal can ends with plastics closures does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Methods of making metal can ends with plastics closures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods of making metal can ends with plastics closures will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1329652