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US4897273A Expired / Lapsed US ⏱️ 0.0 years remaining

Package with freshness keeping agent sack

Assignee: Mitsubishi Gas Chemical Co Inc
•
Filing: 1987-08-06
•
Granted: 1990-01-30
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Expires: 2007-08-06
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Abstract

Abstract A package of a food or a similar product which has to be preserved in fresh state. The package contains a sack charged with a freshness keeping agent for keeping the product fresh together with the product. The package comprises a carrier seat provided in the package and carrying the sack of freshness keeping agent fixed thereto, the seat having one end integrally heat-welded in one of the heat-sealed portions of the package and the other end integrally heat-welded in the other of the heat-sealed portions of the package. The carrier sheet is prepared by a process which has the steps of preparing a train of sacks in which a plurality of sacks, each containing the freshness keeping agent, are connected in series at least unidirectionally, feeding the train of sacks in one direction, feeding a continuous carrier sheet such that the carrier heat and the leading sack on the train of sacks are positioned one on the other, and attaching the leading sack on the train of sacks to the carrier sheet and severing, before or after the attaching, the leading sack from the remainder portion of the trains of sacks. Disclosed also is an apparatus suitable for producing this carrier sheet.

Inventors

  • 👤 Kazutoshi Kotaki
  • 👤 Syuji Wakamatsu
  • 👤 Tadahiko Egawa
  • 👤 Yoshikazu Morita
  • 👤 Kou Iwata

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 23:56
CPC Classifications
B; B65; B65B; B65B15/00; B65B15/04; B65D; B65D81/00; B65D81/24; B65D81/26; B65D81/266; B65D81/268; B65B9/00; B65B9/10; B65B9/20

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 126 words
A package containing a product to be preserved and a sack of a freshness keeping agent, said sack and its contents being adapted to remove from the atmosphere in the package components that would diminish the product freshness, said package comprising opposed walls that are heat-sealed together at opposed ends of a first dimension of said package to define a product-containing space; and a sheet within the product-containing space extending between and integrally heat-sealed into, said opposed heat-sealed ends of the package but being otherwise unattached to the package walls, said sheet having a width that is less than the corresponding dimension of the package, and having the sack of freshness keeping agent attached thereto at a point remote from the heat-sealed ends of the sheet.
Claim 2
Dependent Claim 126 words
A package containing a product to be preserved and a sack of a freshness keeping agent, said sack and its contents being adapted to remove from the atmosphere in the package components that would diminish the product freshness, said package comprising opposed walls that are heat-sealed together at opposed ends of a first dimension of said package to define a product-containing space; and a sheet within the product-containing space extending between and integrally heat-sealed into, said opposed heat-sealed ends of the package but being otherwise unattached to the package walls, said sheet having a width that is less than the corresponding dimension of the package, and having the sack of freshness keeping agent attached thereto at a point remote from the heat-sealed ends of the sheet.
Claim 3
Dependent Claim 16 words
A package according to claim 1, wherein said sheet comprises a web-like sheet of a plastic.
Claim 4
Dependent Claim 15 words
A package according to claim 2, wherein said sheet comprises a heat-weldable thermoplastic resin film.
Claim 5
Dependent Claim 35 words
A package according to claim 3, wherein said sheet has a laminated structure composed of said heat-weldable thermoplastic resin film and at least one film of nylon or polyester formed on said heat-weldable thermoplastic resin.
Claim 6
Dependent Claim 26 words
A package according to claim 1, wherein said sack of freshness keeping agent is fixed to said sheet by means of an adhesive or by heat-welding.
Claim 7
Dependent Claim 49 words
A package according to claim 1, wherein said freshness keeping agent is an agent selected from the group consisting of a de-oxidizing agent, a dehydrating agent, a carbon dioxide absorbing agent, an ethylene absorbing agent, an alcohol generating agent and a mixture of two or more of said agents.
Claim 8
Dependent Claim 35 words
A package according to claim 1, wherein said freshness keeping agent is a de-oxidizing agent, and wherein said package is made from a material having an oxygen permeability of 100 ml/m 2 atmday or less.

References Cited (Backward Citations)

US3084984A Cited
US3255020A Cited
US3346398A Cited
US3367785A Cited
US3419400A Cited
US3670874A Cited
US3840680A Cited
US4041209A Cited
JPS55135542A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1993-01-29 1993-07-31 1994-01-30 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1997-01-29 1997-07-31 1998-01-30 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2001-01-29 2001-07-31 2002-01-30 $7700.00 Window Closed / Lapsed

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