Patent US3768381A successfully refreshed from Google Patents.
US3768381A
Expired / Lapsed
US
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Device for the erection of blanks for making plug-in-folding boxes
Assignee: Schweizerische Industrie Gesellschaft
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Filing: 1972-01-03
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Granted: 1973-10-30
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Expires: 1992-01-03
Abstract
Abstract Below a stack of blanks in a receiving frame is arranged an upwardly and downwardly movable piston which engages and sucks in the bottom forming portion of the lowermost blank and moves it downwardly past stationary guide members which fold the side wall forming portions and cover upwardly. A control piston actuates pivotally mounted grippers which enter into corner slots at the bottom forming portion of the blank and clamp the bottom of the box against the suction piston during its downward movement.
Inventors
- 👤 G Kopp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:38
CPC Classifications
B; B31; B31B; B31B50/00; B31B50/74; B31B50/76; B31B50/80; B31B50/02; B31B50/04; B31B50/06; B31B50/26; B31B50/44; B31B50/46; B31B50/60; B31B50/73; B31B50/732; B31B50/734
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
126 words
Device for the erection of blanks for making plug-in-folding boxes, comprising receiving means for a stack of blanks, guide members extending downwardly from said receiving means, an upwardly and downwardly movable suction piston arranged below said receiving means for sucking in the bottom portion of the lowermost blank of said stack and drawing it downwardly between the guide members to prodice an upward folding of the walls of the blank and their mutual plug-in-fastening to the edges of the folded box and pivotably mounted grippers, when after an introducing downward movement of the suction piston during which the portion of the blank is separated from the remaining stack, enter slots in the blank and engage its bottom portion for clamping the same to the suction piston.
Claim 2
Dependent Claim
126 words
Device for the erection of blanks for making plug-in-folding boxes, comprising receiving means for a stack of blanks, guide members extending downwardly from said receiving means, an upwardly and downwardly movable suction piston arranged below said receiving means for sucking in the bottom portion of the lowermost blank of said stack and drawing it downwardly between the guide members to prodice an upward folding of the walls of the blank and their mutual plug-in-fastening to the edges of the folded box and pivotably mounted grippers, when after an introducing downward movement of the suction piston during which the portion of the blank is separated from the remaining stack, enter slots in the blank and engage its bottom portion for clamping the same to the suction piston.
Claim 3
Dependent Claim
45 words
Device according to claim 1, including an upwardly and downwardly movable control piston, which through an advancing or lagging movement with reference to the suction piston controls said grippers in such manner that the same engage and release the bottom portion, respectively, of the blank.
Claim 4
Dependent Claim
50 words
Device according to claim 1, in which said receiving means for the stack of blanks is provided with stops in the range of the corner flaps of the blank, said stops having an inner edge over which said corner flaps slide upon removal of the lowermost blank from the stack.
Claim 5
Dependent Claim
48 words
Device according to claim 1, wherein each of the guide members has an upper portion which is convex inwardly to a vertically extending lower portion, the guide members being arranged with their lower portions forming a rectangular shaft for the passage of the blank during the folding operation.
Claim 6
Dependent Claim
28 words
Device according to claim 4, in which said guide members have edge zones serving for the mutual plug-in-fastening of the upwardly folded walls formed by projecting blank sections.
References Cited (Backward Citations)
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US3067654A
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US3149544A
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US3370516A
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US3533333A
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US3638537A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |