US3838632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for making corrugated containers of longitudinally corrugated strips on continuous basis
Assignee: Kk Osaka ja
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Filing: 1972-08-14
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Granted: 1974-10-01
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Expires: 1992-08-14
Abstract
Abstract The present invention relates to a method and apparatus for making corrugated cardboard container blanks of longitudinally corrugated cardboard based on a new idea of producing stitchless corrugated container blanks on a continuous basis. An elongated strip of corrugated cardboard is formed, the corrugations of the core ply of which extend longitudinally. The face plies are laterally offset in opposite directions so as to form stepped edges at both sides of the strip. Transverse and longitudinal folds or creases and slots are formed in the strip and the strip is formed into a tube by joining the stepped edges on a mandrel which is gradually flattened, and individual stitchless corrugated container blanks can then be cut off the flattened tube.
Inventors
- 👤 H Miyake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:27
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/26; B32B3/28; B31; B31F; B31F1/00; B31F1/20; B31F1/22; B31F1/225; B32B1/00; B32B1/08; B32B7/00; B32B7/04; B32B7/12; B32B2439/00; B32B2439/40; B32B2439/62; B32B2553/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
149 words
A method of continuously producing flat folded corrugated container blanks, comprising the steps of: making an elongated strip of corrugated cardboard having a corrugated core ply the corrugations of which extend longitudinally thereof and having face plies on the opposite faces of said core ply with one face ply laterally offset in one direction relative to the core ply and the other face ply laterally offset in the opposite direction relative to the core ply; moving said strip of corrugated cardboard longitudinally along an elongated mandrel and folding the strip around the mandrel to form a tube of the corrugated cardboard in which the corrugations of the core ply extend in the direction of the length of the tube, and adhering the edges of the offset face plies and the edges of the core plies to each other; flattening said tube; and severing the flattened tube into desired lengths.
Claim 2
Independent Claim
149 words
A method of continuously producing flat folded corrugated container blanks, comprising the steps of: making an elongated strip of corrugated cardboard having a corrugated core ply the corrugations of which extend longitudinally thereof and having face plies on the opposite faces of said core ply with one face ply laterally offset in one direction relative to the core ply and the other face ply laterally offset in the opposite direction relative to the core ply; moving said strip of corrugated cardboard longitudinally along an elongated mandrel and folding the strip around the mandrel to form a tube of the corrugated cardboard in which the corrugations of the core ply extend in the direction of the length of the tube, and adhering the edges of the offset face plies and the edges of the core plies to each other; flattening said tube; and severing the flattened tube into desired lengths.
Claim 3
Dependent Claim
27 words
A method as claimed in claim 1 further comprising the steps of creasing, scoring and slotting said flattened tube for forming carton blanks from the said lengths.
Claim 4
Dependent Claim
61 words
A method as claimed in claim 1 in which the step of adhering the edges of the offset plies and the edges of the core plies comprises adhering the inner surface of the edge of each face ply which projects beyond the core ply to the outer surface of the edge of said face ply beyond which the core ply extends.
Claim 5
Dependent Claim
31 words
A method as claimed in claim 3 in which the corrugations at one edge of the core ply are interfitted with the corrugations at the other edge of the core ply.
Claim 6
Dependent Claim
31 words
A method as claimed in claim 3 in which the corrugation at one edge of the core ply is abutted against the corrugation at the other edge of the core ply.
Claim 7
Independent Claim
358 words
An apparatus for producing flat folded corrugated container blanks, comprising: a corrugating means for receiving a strip of flat core ply stock and forming in it corrugations extending longitudinally of the strip to form a strip of core ply; a support plate for receiving the strip of core ply; adhesive applicator means between the corrugating means and the support plate for applying adhesive to the top portions of the corrugations on both sides of the core ply; face ply feed means adjacent the support plate for feeding a face ply against the lower surface of the core ply as it moves onto the suppOrt plate and for feeding a face ply against the upper surface of the core ply as it moves onto the support plate to form a strip of corrugated cardboard, said face ply feed means including edge detectors for detecting and controlling the direction of feed of the face plys for offsetting one of the face plys in one lateral direction relative to the core ply and offsetting the other face ply in the opposite lateral direction relative to the core ply; a mandrel extending in the same direction as said support plate from the end of the support plate opposite the end adjacent to the corrugating means, said mandrel having a generally rectangular cross section tubular part adjacent the support plate, a flat part at the end remote from the support plate, and an intermediate part tapering gradually from the tubular part to the flattened part; an adhesive applicator adjacent the tubular part of the mandrel for applying adhesive to the edges of the corrugated cardboard; corrugated cardboard bending means along said tubular part of said mandrel for bending the strip of cardboard longitudinally around said mandrel and overlapping the edges thereof for forming a tube of the corrugated cardboard; cardboard pressing means along said mandrel for pressing the overlapped edges of the cardboard; feed means along said mandrel for engaging said tube of corrugated cardboard and feeding it along said mandrel; and transverse cutting means at the end of said mandrel for cutting lengths of said tube of corrugated cardboard from said tube.
Claim 8
Independent Claim
358 words
An apparatus for producing flat folded corrugated container blanks, comprising: a corrugating means for receiving a strip of flat core ply stock and forming in it corrugations extending longitudinally of the strip to form a strip of core ply; a support plate for receiving the strip of core ply; adhesive applicator means between the corrugating means and the support plate for applying adhesive to the top portions of the corrugations on both sides of the core ply; face ply feed means adjacent the support plate for feeding a face ply against the lower surface of the core ply as it moves onto the suppOrt plate and for feeding a face ply against the upper surface of the core ply as it moves onto the support plate to form a strip of corrugated cardboard, said face ply feed means including edge detectors for detecting and controlling the direction of feed of the face plys for offsetting one of the face plys in one lateral direction relative to the core ply and offsetting the other face ply in the opposite lateral direction relative to the core ply; a mandrel extending in the same direction as said support plate from the end of the support plate opposite the end adjacent to the corrugating means, said mandrel having a generally rectangular cross section tubular part adjacent the support plate, a flat part at the end remote from the support plate, and an intermediate part tapering gradually from the tubular part to the flattened part; an adhesive applicator adjacent the tubular part of the mandrel for applying adhesive to the edges of the corrugated cardboard; corrugated cardboard bending means along said tubular part of said mandrel for bending the strip of cardboard longitudinally around said mandrel and overlapping the edges thereof for forming a tube of the corrugated cardboard; cardboard pressing means along said mandrel for pressing the overlapped edges of the cardboard; feed means along said mandrel for engaging said tube of corrugated cardboard and feeding it along said mandrel; and transverse cutting means at the end of said mandrel for cutting lengths of said tube of corrugated cardboard from said tube.
Claim 9
Dependent Claim
44 words
An apparatus as claimed in claim 6 further comprising slitting means and creasing means along said support means between said face ply feeding means and said mandrel for slitting the cardboard and creasing it for providing flaps and fold lines in the finished blanks.
Claim 10
Dependent Claim
143 words
An apparatus as claimed in claim 6 in which said corrugating means comprises a plurality of groups of balls the size of the corrugations to be formed in the core ply stock, each group of balls having a plurality of upper side by side rows of balls and lower side by side rows of balls, the rows extending in an inwardly converging direction along the direction of length of the core ply, the rows of balls in the upper row being positioned between the rows of balls in the lower row, the groups of balls being spaced in the direction of length of the core stock and the rows in the successive groups being closer together and the upper balls in the successive groups being closer to the lower balls with the balls in the last successive group being substantially side by side.
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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |