§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
US4158425A Expired / Lapsed US ⏱️ 0.0 years remaining

Composite container construction

Assignee: Sonoco Products Co
•
Filing: 1977-12-30
•
Granted: 1979-06-19
•
Expires: 1997-12-30
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A composite container comprising a tubular body formed of spirally wound plies of paperboard or the like and an internal vacuum accommodating liner substantially coextensive with the length of the tubular body and adhesively affixed solely at the opposed ends thereof to the tubular body. The container is completed by the mounting of opposed end caps which are hermetically sealed to the adhesively secured opposed ends of the liner for the accommodation of an internally developed vacuum within the liner. Formation of the tubular body and liner is effected utilizing conventional spiral winding equipment and involves (1) spirally forming a continuous liner with wide bands of adhesive spaced to correspond generally to the length of tube desired, (2) spirally forming a continuous length of composite tubing about the liner, the liner bonding peripherally to the tubing at the adhesive bands, and (3) severing the continuous tubing at a point generally centrally of each adhesive band whereby each formed tube will have the liner thereof adhesively secured solely at the opposite ends.

Inventors

  • 👤 Jerry F. Sansbury

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 18:13
CPC Classifications
B; B65; B65D; B65D3/00; B65D3/22

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 118 words
In a container adapted for vacuum packing, an elongated shape-sustaining composite body having inner and outer wall faces and opposed first and second end portions, a flexible hermetic liner within said body substantially coextensive with said body, said liner having opposed first and second end portions generally aligned respectively with the first and second end portions of the body, adhesive on said liner means securing the first and second end portions of the liner respectively to the inner face of the wall of said first and second internal end portions of the body, said liner, between the adhered first and second end portions thereof, being free of said body and independently freely inwardly flexible relative to said body.
Claim 2
Dependent Claim 118 words
In a container adapted for vacuum packing, an elongated shape-sustaining composite body having inner and outer wall faces and opposed first and second end portions, a flexible hermetic liner within said body substantially coextensive with said body, said liner having opposed first and second end portions generally aligned respectively with the first and second end portions of the body, adhesive on said liner means securing the first and second end portions of the liner respectively to the inner face of the wall of said first and second internal end portions of the body, said liner, between the adhered first and second end portions thereof, being free of said body and independently freely inwardly flexible relative to said body.
Claim 3
Dependent Claim 17 words
The construction of claim 1 including means for hermetically sealing the opposed end portions of the liner.
Claim 4
Dependent Claim 29 words
The construction of claim 2 wherein the means for hermetically sealing the opposed end portions of the liner comprises end caps mounted on the opposed ends of said body.
Claim 5
Dependent Claim 29 words
The construction of claim 2, wherein the means for hermetically sealing the opposed end portions of the liner comprises end caps mounted on the opposed ends of said body.
Claim 6
Dependent Claim 23 words
The construction of claim 1 wherein said liner, between the secured first and second end portions thereof, includes a full length expandable fold.

References Cited (Backward Citations)

US2328798A Cited
US2700518A Cited
US2771184A Cited
US3083889A Cited
US3194471A Cited
US3487989A Cited
US3942708A Cited
US3981433A Cited
US4087003A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1982-06-18 1982-12-18 1983-06-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1986-06-18 1986-12-18 1987-06-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1990-06-18 1990-12-18 1991-06-19 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag