The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 17, 2000
Filed:
Oct. 09, 1998
William E Archibald, Maple Grove, MN (US);
Rodney K Gwiazdon, Minneapolis, MN (US);
George A Tuszkiewicz, Plymouth, MN (US);
General Mills, Inc., Minneapolis, MN (US);
Abstract
A container is used to store fine particles such as bakery flour in a sealed packaging, wherein air in the container, such as air entrapped during filling, can be expelled through compression without loss of fine particles. The container includes a main body forming a pouch which terminates in a principal opening and is fabricated from an imperforate flexible material such as clear plastic film. A sealing mechanism is attached to the pouch for sealing the pouch, and a multiplicity of microscopic pores extend through the flexible material. Each pore has a dimension ranging from 10 to 150 .mu.m sufficient to permit air to exit through an exit port, but to prevent the fine particles from escaping through the pores. At least a portion of the pouch material has an anti-slip surface with an external coefficient of friction ranging from about 0.4 to 0.5.