Claims
- 1. A method for forming a container comprising,
- feeding first and second webs of substantially similarly imprinted thermally sealable synthetic resinous film from a pair of spaced apart feed rolls in unspaced-apart overlapping relationship over a lateral support surface, each web in a range from 0.5 mil (12.5.mu.) to 2 mil (50.8.mu.) thick and having continuously imprinted, in overlapping printed portions thereof, an ornamental decorative design of contrasting bright colors;
- maintaining constant tension over the length of each web as said webs travel over said support surface;
- continuously advancing said webs longitudinally along said support surface; interrupting said webs on said support surface to stop them at predetermined intervals without interrupting feeding of said webs from a pair of feed rolls;
- heat-sealing edges of said lower printed portions of said webs together along a line to provide a water-impervious bottom planar edge for the container, and, also along equally angulated but oppositely directed side edges, to provide the container's exterior lower portion with a printed, smoothly planar surface uninterrupted by an elongated unprinted rectangular portion adjacent each of the side edges in the lower portion, and, an essentially light permeable upper portion free from any portion of printing present in the lower portion;
- discarding material intermediate sequentially heat-sealed containers, this material having an area more than one-half that required to form said container; and, collecting a mass of individual and separate containers.
- 2. In a method for forming a container comprising, feeding first and second webs of substantially similarly imprinted thermally sealable synthetic resinous film in unspaced-apart overlapping relationship over a lateral support surface from a pair of spaced apart feed rolls, each web imprinted with an ornamental decorative design of contrasting bright colors; maintaining constant tension over the length of each web as said webs travel over said support surface; continuously advancing said webs longitudinally along said support surface; interrupting said webs on said support surface to stop them at predetermined intervals without interrupting feeding of said webs from said pair of feed rolls; heat-sealing edges of said lower printed portions of said webs together along a longitudinal line to provide a water-impervious bottom planar edge for the container, and, also along equally angulated but oppositely directed side edges, to provide the container's exterior lower portion with a printed, smoothly planar surface, so as to provide an essentially light permeable upper portion, and, collecting a mass of individual and separate containers, the improvement comprising,
- feeding webs of substantially similarly imprinted film, each web in a range from 0.5 mil (12.5.mu.) to 2 mil (50.8.mu.) thick, each web being continuously imprinted with said decorative design in overlapping printed portions of said webs;
- heat-sealing said lower printed portions of said webs so as to provide said lower portion with printing uninterrupted by an elongated unprinted rectangular portion adjacent each of said side edges in said lower portion, and, to provide said essentially light permeable upper portion free from any portion of printing present in said lower portion; and,
- discarding material intermediate sequentially heat-sealed containers, this material having an area more than one-half that required to form said container.
Parent Case Info
This is a division of patent application Ser. No. 08/248,391 filed on 23 May 1994, now U.S. Pat. No. 5,388,695.
US Referenced Citations (16)
Divisions (1)
|
Number |
Date |
Country |
Parent |
248391 |
May 1994 |
|