Method of preparing a package having a multiple-film lid
AssigneeW. R. Grace & Co.-Conn.
InventorsDavid C. Noel, Henry W. Stockley, III
Life of this patent
Estimating the term…
Abstract
A method of preparing a package having a product enclosed between a support member and a multiple-film lid, comprising the steps of providing a support member supporting a product; providing a multiple-film lid over the product and the support member, the multiple-film lid having a first film for enclosing the product on the support member when sealed thereto and a second film over the first film, the first film and the second film defining a first space therebetween and the first film and the support member defining a second space therebetween; evacuating the first and second spaces; and sealing the multiple-film lid to the support member so as to form a sealed package.
Claims19
A method of preparing a package having a product enclosed between a support member and a multiple-film lid, comprising the steps of:
- providing a support member supporting a product;
- providing a multiple-film lid and positioning said multiple-film lid over said product and said support member, said multiple-film lid having a first film for enclosing said product on said support member when sealed thereto and a second film over said first film, said first film and said second film defining a first space therebetween and said first film and said support member defining a second space therebetween;
- providing means for evacuating said first and second spaces;
- providing a fluid passage in at least one of said first film and said second film for fluid communication between said means for evacuating and said first space;
- evacuating said first and second spaces with said evacuation means;
- and
- sealing said multiple-film lid to said support member.
A method of preparing a package having a product enclosed between a support member and a multiple-film lid, comprising the steps of:
- providing a support member supporting a product;
- providing a multiple-film lid and positioning said multiple-film lid over said product and said support member, said multiple-film lid having a first film for enclosing said product on said support member and a second film over said first film, said first film and said second film defining a first space therebetween and said first film and said support member defining a second space therebetween;
- providing a fluid passage in at least one of said first film and said second film;
- providing an evacuating and sealing station having a vacuum means for providing a vacuum within said station and having a sealing means for sealing said multiple-film lid to said support member, said sealing means being positioned within said vacuum means, wherein said vacuum means defines a vacuum perimeter and said sealing means defines a sealing perimeter within said vacuum perimeter;
- placing said support member supporting the product with said first and second films positioned thereover in said station such that said fluid passage is positioned inside said vacuum perimeter and outside said sealing perimeter;
- evacuating said first and second spaces with said vacuum means;
- and
- sealing said multiple-film lid to said support member.
Dependencies are inferred from the claim text.