US3732790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrugated container and method and apparatus for manufacturing the same
Assignee: Nisso KK
•
Filing: 1970-12-18
•
Granted: 1973-05-15
•
Expires: 1990-12-18
Abstract
Abstract The present invention relates to the stitchless tubular container and the stitchless box container and the method and the apparatus for manufacturing the same, which containers are produced from material strips by the successive process which comprises the step of making a tubular body, whereby the corrugated strips with their flutes obliquely or longitudinally flowed in the axial direction are superposed on the liner strips, the adjacent edges of adjacent convolutions thereof are overlapped each other, the step of making longitudinal creases on the tubular body, the step of gradually flattening the tubular body thus obtained and finally severing said flat tubular body into individual corrugated containers.
Inventors
- 👤 H Miyake
- 👤 A Hayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:04
CPC Classifications
B; B31; B31B; B31B70/00; B31B50/00; B31B50/26; B31B50/28; B31B50/30; B31B50/34; B31B2100/00; B31B2120/00; B31B2120/70; B31B2160/00; B31B2160/10; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1016; Y10T156/102
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
258 words
A method of continuously producing folded, corrugated containers, comprising the steps of supplying to a rotating mandrel at least one liner strip for spirally winding the liner strip on the mandrel with the trailing edge of each spire of the wound strip overlapping the leading edge of the preceding spire, forming at least one corrugated strip having successive concave and convex flutes extending transversely thereof with the flutes having a different radius of curvature at each end thereof with the one ends of successive concave and convex flutes having a larger radius of curvature and a smaller radius of curvature and the other ends of the corresponding flutes having a smaller radius of curvature and a larger radius of curvature, applying adhesive to the thus formed corrugated strip, supplying the corrugated strip to the rotating mandrel for spirally winding the corrugated strip on the mandrel over the liner strip and adhering the corrugated strip to the winding strip, with the trailing edge of each spire of the wound corrugated strip overlapping the leading edge of the preceding spire of the corrugated strip with the larger one ends of the convex flute ends fitting over the smaller convex flute ends, and the smaller concave flute ends fitting into the larger concave flute ends, whereby the liner and corrugated strip are formed as a unit into an endless corrugated tube, forming longitudinal folds or creases in the tube, removing the tube from the mandrel and gradually flattening the tube, and cutting the flattened tube into lengths appropriate for individual containers.
Claim 2
Independent Claim
258 words
A method of continuously producing folded, corrugated containers, comprising the steps of supplying to a rotating mandrel at least one liner strip for spirally winding the liner strip on the mandrel with the trailing edge of each spire of the wound strip overlapping the leading edge of the preceding spire, forming at least one corrugated strip having successive concave and convex flutes extending transversely thereof with the flutes having a different radius of curvature at each end thereof with the one ends of successive concave and convex flutes having a larger radius of curvature and a smaller radius of curvature and the other ends of the corresponding flutes having a smaller radius of curvature and a larger radius of curvature, applying adhesive to the thus formed corrugated strip, supplying the corrugated strip to the rotating mandrel for spirally winding the corrugated strip on the mandrel over the liner strip and adhering the corrugated strip to the winding strip, with the trailing edge of each spire of the wound corrugated strip overlapping the leading edge of the preceding spire of the corrugated strip with the larger one ends of the convex flute ends fitting over the smaller convex flute ends, and the smaller concave flute ends fitting into the larger concave flute ends, whereby the liner and corrugated strip are formed as a unit into an endless corrugated tube, forming longitudinal folds or creases in the tube, removing the tube from the mandrel and gradually flattening the tube, and cutting the flattened tube into lengths appropriate for individual containers.
Claim 3
Dependent Claim
31 words
A method as claimed in claim 1, further comprising the steps of slotting said corrugated tube at longitudinally spaced intervals and making longitudinally spaced transverse folds or creases in said tube.
Claim 4
Dependent Claim
44 words
A method as claimed in claim 1 in which the steps of supplying at least one liner strip comprises supplying two opposed liner strips, one being supplied prior to winding the corrugated strip and the second being supplied for winding over said corrugated strip.
Claim 5
Independent Claim
311 words
A method of continuously producing folded, corrugated containers, comprising the steps of supplying to a rotating mandrel which gradually becomes flatter from one end toward the other at least one liner from a direction oblique to the axis of rotation of the mandrel for spirally winding the liner strip on the mandrel with the trailing edge of each spire of the wound strip overlapping the leading edge of the preceding spire, forming at least one corrugated strip having successive concave and convex flutes extending transversely thereof with the flutes having a different radius of curvature at each end thereof with the one ends of successive concave and convex flutes having a larger radius of curvature and a smaller radius of curvature and the other ends of the corresponding flutes having a smaller radius of curvature and a larger radius of curvature, applying adhesive to the thus formed corrugated strip, supplying the corrugated strip to the rotating mandrel from a point spaced along the mandrel from the supply point of the liner strip and from a direction oblique to the axis of rotation of the mandrel for spirally winding the corrugated strip on the mandrel over the liner strip and adhering the corrugated strip to the winding strip, with the trailing edge of each spire of the wound corrugated strip overlapping the leading edge of the preceding spire of the corrugated strip with the larger one ends of the convex flute ends fitting over the smaller convex flute ends, and the smaller concave flute ends fitting into the larger concave flute ends, whereby the liner and corrugated strip are formed as a unit into an endless corrugated tube, forming longitudinal folds or creases in the tube, feeding the tube along the mandrel toward the flattened end and gradually flattening the tube, and cutting the flattened tube into lengths appropriate for individual containers.
Claim 6
Independent Claim
311 words
A method of continuously producing folded, corrugated containers, comprising the steps of supplying to a rotating mandrel which gradually becomes flatter from one end toward the other at least one liner from a direction oblique to the axis of rotation of the mandrel for spirally winding the liner strip on the mandrel with the trailing edge of each spire of the wound strip overlapping the leading edge of the preceding spire, forming at least one corrugated strip having successive concave and convex flutes extending transversely thereof with the flutes having a different radius of curvature at each end thereof with the one ends of successive concave and convex flutes having a larger radius of curvature and a smaller radius of curvature and the other ends of the corresponding flutes having a smaller radius of curvature and a larger radius of curvature, applying adhesive to the thus formed corrugated strip, supplying the corrugated strip to the rotating mandrel from a point spaced along the mandrel from the supply point of the liner strip and from a direction oblique to the axis of rotation of the mandrel for spirally winding the corrugated strip on the mandrel over the liner strip and adhering the corrugated strip to the winding strip, with the trailing edge of each spire of the wound corrugated strip overlapping the leading edge of the preceding spire of the corrugated strip with the larger one ends of the convex flute ends fitting over the smaller convex flute ends, and the smaller concave flute ends fitting into the larger concave flute ends, whereby the liner and corrugated strip are formed as a unit into an endless corrugated tube, forming longitudinal folds or creases in the tube, feeding the tube along the mandrel toward the flattened end and gradually flattening the tube, and cutting the flattened tube into lengths appropriate for individual containers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |