US3728840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for filling up and sealing a synthetic resin tetrahedron
Assignee: Individual
•
Filing: 1971-07-28
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Granted: 1973-04-24
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Expires: 1991-07-28
Abstract
Abstract Apparatus and method for forming a container having no longitudinal seam by passing a flatly folded continuous length of tubular material comprising a pair of oppositely positioned longitudinal folds through means for compressing said folds together while a transverse heat seal is formed at an end of said tubular material perpendicularly to said folds. After the heat sealing operation, the folds are released and the cut edges will separate to form an open mouth into which substances to be stored may be placed. A cover is subsequently sealed to the cut edges to close the container.
Inventors
- 👤 S Izumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:42
CPC Classifications
B; B65; B65B; B65B43/00; B65B43/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
181 words
Apparatus for making a container without a longitudinal seam comprising means for feeding into said apparatus a continuous length of tubular material folded in a first flattened configuration with a pair of oppositely positioned longitudinal folds formed along the length of said tubular material, means for compressing said folds together to form said tubular material into a second flattened configuration with the sides of said material extending generally in a direction perpendicular to the direction in which said sides extend when said material is in said first flattened configuration, means for forming a heat seal at an end of said tubular material in a direction extending transversely of said folds while said folds are held compressed, means for cutting said material along said transverse direction at a point longitudinally spaced from said heat seal, means for filling the cut end heat seal portion of said tubular material with a substance to be stored therein after said compressed folds have been released, and means for applying a cover onto said cut portion sealed along the cut edges thereof to form said container.
Claim 2
Dependent Claim
181 words
Apparatus for making a container without a longitudinal seam comprising means for feeding into said apparatus a continuous length of tubular material folded in a first flattened configuration with a pair of oppositely positioned longitudinal folds formed along the length of said tubular material, means for compressing said folds together to form said tubular material into a second flattened configuration with the sides of said material extending generally in a direction perpendicular to the direction in which said sides extend when said material is in said first flattened configuration, means for forming a heat seal at an end of said tubular material in a direction extending transversely of said folds while said folds are held compressed, means for cutting said material along said transverse direction at a point longitudinally spaced from said heat seal, means for filling the cut end heat seal portion of said tubular material with a substance to be stored therein after said compressed folds have been released, and means for applying a cover onto said cut portion sealed along the cut edges thereof to form said container.
Claim 3
Dependent Claim
47 words
Apparatus according to claim 1, wherein said means for feeding said tubular material comprise a pair of power driven rollers between which said material is engaged, and a supply roll of said material wound in said first flattened configuration from which said power rolls draw said material.
Claim 4
Dependent Claim
49 words
Apparatus according to claim 1, wherein said means for compressing said folds together comprise at least one pair of rollers having circumferential grooves formed therein, said rollers being positioned on opposite sides of said material with said pair of longitudinal folds extending to within the grooves of said rollers.
Claim 5
Dependent Claim
29 words
Apparatus according to claim 3, wherein there is provided a plurality of pairs of said grooved rollers, with each pair being successfully spaced closer together than a preceding pair.
Claim 6
Dependent Claim
82 words
Apparatus according to claim 1, wherein said means for compressing said folds comprise a die member through which said tubular material is passed, said die member having a pair of opposed sides of curved configuration with said sides tapering together from a widely spaced apart end to a narrowly spaced end, said curved configuration being adapted to have said folds slide therein as said tubular material is passed through said die member from said widely spaced end to said closely spaced end.
Claim 7
Dependent Claim
56 words
Apparatus according to claim 1, wherein said means for filling include a conveyor having a plurality of movable bucket members into which said cut and heat sealed portions are placed with the cut edges thereof upwardly directed and spaced apart and in which said portions are held while said substance to be stored is placed therein.
Claim 8
Dependent Claim
38 words
Apparatus according to claim 6, wherein said means for applying said cover include means for sealing said cover to the cut edges of said cut and heat sealed portion while it is in one of said bucket members.
Claim 9
Independent Claim
162 words
A method for making a container without a longitudinal seam comprising the steps of folding a continuous length of tubular material into a first flattened configuration with a pair of oppositely positioned longitudinal folds being formed along a length of said tubular material, compressing said folds together by forming said tubular material into a second flattened configuration with the sides of said material extending generally in a direction perpendicular to the direction in which said sides extended when in said first flattened configuration, forming a heat seal at an end of said tubular material in a direction extending transversely of said pair of longitudinal folds, cutting said material along said transverse direction at a point longitudinally spaced from said heat seal, releasing said compressed folds, filling the cut and heat sealed portion of said tubular material with a substance to be stored therein, and closing said cut portion by sealing a cover thereto along the cut edges thereof to form said container.
Claim 10
Independent Claim
162 words
A method for making a container without a longitudinal seam comprising the steps of folding a continuous length of tubular material into a first flattened configuration with a pair of oppositely positioned longitudinal folds being formed along a length of said tubular material, compressing said folds together by forming said tubular material into a second flattened configuration with the sides of said material extending generally in a direction perpendicular to the direction in which said sides extended when in said first flattened configuration, forming a heat seal at an end of said tubular material in a direction extending transversely of said pair of longitudinal folds, cutting said material along said transverse direction at a point longitudinally spaced from said heat seal, releasing said compressed folds, filling the cut and heat sealed portion of said tubular material with a substance to be stored therein, and closing said cut portion by sealing a cover thereto along the cut edges thereof to form said container.
Claim 11
Dependent Claim
26 words
A method according to claim 8, wherein said continuous length of tubular material is fed in said first flattened configuration from a roll of such material.
Claim 12
Dependent Claim
48 words
A method according to claim 8, wherein the step of compressing said folds together is accomplished by passing said material Between at least a pair of opposed rollers having grooves along the circumference thereof with said folds each positioned, respectively, in grooves of one of said opposed rollers.
References Cited (Backward Citations)
US3290198A
Cited
US3347363A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |