Joel Lance Schaffer
Dentist in Boulder, CO

License number
Colorado 427
Issued Date
Jun 25, 1972
Renew Date
Mar 1, 2010
Expiration Date
Feb 29, 2012
Type
Dentist
Address
Address
2880 Folsom Ave STE 202, Boulder, CO 80302

Professional information

Joel Schaffer Photo 1

Beverage Can Stopper

US Patent:
4915252, Apr 10, 1990
Filed:
Mar 28, 1989
Appl. No.:
7/329912
Inventors:
Joel L. Schaffer - Boulder CO
International Classification:
B65D 3900
US Classification:
220307
Abstract:
A stopper seals the opening left in the lid of a metal can upon operation of an integral metal tab that is attached to the top surface of the lid. The stopper comprises a resilient plug having a thickness greater than the thickness of the lid. The plug includes (1) a top portion having a planar size considerably greater than the planar size of the lid opening and including a recessed area to accommodate a section of unsevered metal by which the tab remains attached to the lid; (2) a bottom portion of a planar size greater than the planar size of the opening, thus permitting manual insertion of the bottom portion into the opening so as to sealingly engage the bottom surface of the lid and including an extended area to force the section of unsevered metal up and generally against the under surface of the lid; and (3) a mid-portion that interconnects the top and bottom portions with a thickness that approximates the thickness of the lid and having a planar size that approximates the size of the opening of the mid-portion to sealingly engage the opening, including the section of unsevered metal, throughout the thickness of the lid. A manual actuator extends upward for facilitating manual insertion and removal of the plug relative the opening.