US3745892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for automatically corner-breaking the side flange edges of paperboard blanks
Assignee: Individual
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Filing: 1971-07-28
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Granted: 1973-07-17
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Expires: 1991-07-28
Abstract
Abstract The invention contemplates apparatus and a method for automatically corner-breaking the side-flange edge folds of a paperboard blank having a central-panel area contiguous to and integral with longitudinally opposed side-flange areas. First pinch-roll means accepts flat stock, pinches the same to cornerbreak at a first desired alignment, and passes the entire blank to arresting and positioning means on the other side of the first pinch-roll means. When thus arrested, the blank is positioned adjacent second pinch-roll means, which is caused to accept and pinch the blank to corner-break at a second desired alignment. The blank passes through the first and second pinch-roll means in a continuous path of motion, interrupted only for displacement reversal when positioned for passage through the second pinchroll means. In the specific form shown, the first and second pinch-roll means collectively comprises three rollers, wherein the central roller coacts with one of the other rollers to define the first pinch-roll means, and wherein the central roller coacts with the remaining roller to define the second pinch-roll means.
Inventors
- 👤 R Ganz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:50
CPC Classifications
B; B65; B65B; B65B43/00; B65B43/24; B31; B31B; B31B50/00; B31B50/26; B31B50/56
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
309 words
Mechanism for automatically corner-breaking the side-flange edges of a paperboard blank having a central-panel area contiguous to and integral with longitudinally opposed sideflange areas, comprising blank-supply means presenting successive blanks at a pick-off location, first pinch-roll means establishing a first pinching and longitudinally feeding plane substantially tangent to adjacent oppositely driven surfaces of a first pair of rolls, first blank-positioning means for orienting a blank adjacent said roll surfaces and with a first desired corner-break alignment substantially in said tangent plane, said first blank-positioning means including reciprocating means having a first position of pick-off engagement with the presented end blank at said pick-off location, said reciprocating means being movable to a second position in which the picked-off blank is oriented adjacent the roll surfaces of said first pinch-roll means and with the first desired corner-break alignment substantially in said first-mentioned tangent plane, blankengaging means local to substantially said first alignment when thus positioned and movable to advance the blank into frictional engagement with said first roll means, means continuously driving said first roll means in the direction to pinch and feed the blank along substantially the tangent plane to the other side of said first roll means, second pinch-roll means establishing a second pinching and longitudinally feeding plane substantially tangent to adjacent oppositely driven surfaces of a second pair of rolls, second blank-positioning means arresting the blank and orienting the same adjacent roll surfaces of said second roll means and with the second desired corner-break alignment substantially in said second-mentioned Tangent plane, blankengaging means local to substantially said second alignment when thus positioned and movable to advance the blank into frictional engagement with said second roll means, and means continuously driving said second roll means in the direction to pinch and feed the blank along substantially the second tangent plane to the other side of said second roll means.
Claim 2
Dependent Claim
309 words
Mechanism for automatically corner-breaking the side-flange edges of a paperboard blank having a central-panel area contiguous to and integral with longitudinally opposed sideflange areas, comprising blank-supply means presenting successive blanks at a pick-off location, first pinch-roll means establishing a first pinching and longitudinally feeding plane substantially tangent to adjacent oppositely driven surfaces of a first pair of rolls, first blank-positioning means for orienting a blank adjacent said roll surfaces and with a first desired corner-break alignment substantially in said tangent plane, said first blank-positioning means including reciprocating means having a first position of pick-off engagement with the presented end blank at said pick-off location, said reciprocating means being movable to a second position in which the picked-off blank is oriented adjacent the roll surfaces of said first pinch-roll means and with the first desired corner-break alignment substantially in said first-mentioned tangent plane, blankengaging means local to substantially said first alignment when thus positioned and movable to advance the blank into frictional engagement with said first roll means, means continuously driving said first roll means in the direction to pinch and feed the blank along substantially the tangent plane to the other side of said first roll means, second pinch-roll means establishing a second pinching and longitudinally feeding plane substantially tangent to adjacent oppositely driven surfaces of a second pair of rolls, second blank-positioning means arresting the blank and orienting the same adjacent roll surfaces of said second roll means and with the second desired corner-break alignment substantially in said second-mentioned Tangent plane, blankengaging means local to substantially said second alignment when thus positioned and movable to advance the blank into frictional engagement with said second roll means, and means continuously driving said second roll means in the direction to pinch and feed the blank along substantially the second tangent plane to the other side of said second roll means.
Claim 3
Dependent Claim
33 words
Mechanism according to claim 1, in which said tangent planes are in substantially transverse relation, the second-mentioned transverse plane intersecting the first-mentioned transverse plane on said other side of said first roll means.
Claim 4
Dependent Claim
42 words
Mechanism according to claim 1, in which said first and second pinch-roll means collectively comprise three rolls, the first and second of said three defining said first pinch-roll means, and the second and third of said three defining said second pinch-roll means.
Claim 5
Dependent Claim
46 words
Mechanism according to claim 3, in which said rolls are all cylindrical and in which the plane of the axes of the first two of said three rolls is substantially transverse to the plane of the axes of the second and third of said three rolls.
Claim 6
Dependent Claim
46 words
Mechanism according to claim 1, in which said reciprocating means includes a vacuum pick-off element, and means synchronized with the movement of said reciprocating means and controlling vacuum-operation of said pick-off element for blank-holding throughout movement from the first to second positions of said reciprocating means.
Claim 7
Dependent Claim
45 words
Mechanism according to claim 5, in which said last-defined means includes means synchronized with operation of said first-mentioned blank-engaging means for determining blank-release by said pick-off element as said first-mentioned blank-engaging means begins to advance the blank into frictional engagement with said first roll means.
Claim 8
Dependent Claim
43 words
Mechanism according to claim 5, including means actuating said first-mentioned blank-engaging means in synchronized interlace with movement of said reciprocating means, said first-mentioned blank-engaging means being actuated in the blank-engaging and blank-displacing direction when said reciprocating means attains substantially the second position thereof.
Claim 9
Dependent Claim
45 words
Mechanism according to claim 7, including means actuating said second-mentioned blank-engaging means in synchronized interlace with movement of said first-mentioned blank-engaging means, said second-mentioned blank-engaging means being actuated in the blank-engaging and blank-displacing direction when the blank is being positioned by said second blank-positioning means.
Claim 10
Dependent Claim
25 words
Mechanism according to claim 2, in which said second blank-positioning means includes a stop operative to retain a blank passed through said first roll means.
Claim 11
Dependent Claim
76 words
Mechanism according to claim 4, in which the first-mentioned tangent plane is generally horizontal and said second pinch-roll means is beneath said first-mentioned tangent plane, with the third of said three rolls substantially tangent to said first-mentioned tangent plane, said second blank-positioning means including a stop operative to arrest blank movement after it has cleared the pinch region of said first roll means and with the blank supported at least in part by said third roll.
Claim 12
Dependent Claim
15 words
Mechanism according to claim 1, in which a single drive provides both said drive means.
Claim 13
Dependent Claim
24 words
Mechanism according to claim 1, in which all rolls of said first and second pinch-roll means are cylindrical and of substantially the same diameter.
Claim 14
Dependent Claim
22 words
Mechanism according to claim 12, in which all rolls of said first and second pinch-roll means have external surfaces of friction material.
Claim 15
Dependent Claim
30 words
Mechanism according to claim 1, in which said blank-supply means comprises a magazine for retaining a plurality of flat blanks, the pick-off location being at one end of said magazine.
Claim 16
Dependent Claim
290 words
Mechanism for automatically corner-breaking the side-flange edges of a paperboard blank having a central-panel area contiguous to and integral with longitudinally opposed side-flange areas, comprising first piNch-roll means establishing a first pinching and longitudinally feeding plane substantially tangent to adjacent oppositely driven surfaces of a first pair of rolls, first blank-positioning means for orienting a blank adjacent said roll surfaces and with a first desired corner-break alignment substantially in said tangent plane, blank-engaging means local to substantially said first alignment when thus positioned and movable to advance the blank into frictional engagement with said first roll means, means continuously driving said first roll means in the direction to pinch and feed the blank along substantially the tangent plane to the other side of said first roll means, second pinch-roll means establishing a second pinching and longitudinally feeding plane substantially tangent to adjacent oppositely driven surfaces of a second pair of rolls, second blank-positioning means arresting the blank and orienting the same adjacent roll surface of said second roll means and with the second desired corner-break alignment substantially in said second-mentioned tangent plane, blank-engaging means local to substantially said second alignment when thus positioned and movable to advance the blank into frictional engagement with said second rolls means, means continuously driving said second roll means in the direction to pinch and feed the blank along substantially the second tangent plane to the other side of said second roll means, conveyor means in synchronism with said drive means and engaging and advancing successive blanks discharged from said second roll means, and flange-kicker means on the flange-folded side of said conveyor means and synchronized with blank-conveying movement to engage flanges bent by said second roll means and kicking them in the unbending direction.
Claim 17
Dependent Claim
290 words
Mechanism for automatically corner-breaking the side-flange edges of a paperboard blank having a central-panel area contiguous to and integral with longitudinally opposed side-flange areas, comprising first piNch-roll means establishing a first pinching and longitudinally feeding plane substantially tangent to adjacent oppositely driven surfaces of a first pair of rolls, first blank-positioning means for orienting a blank adjacent said roll surfaces and with a first desired corner-break alignment substantially in said tangent plane, blank-engaging means local to substantially said first alignment when thus positioned and movable to advance the blank into frictional engagement with said first roll means, means continuously driving said first roll means in the direction to pinch and feed the blank along substantially the tangent plane to the other side of said first roll means, second pinch-roll means establishing a second pinching and longitudinally feeding plane substantially tangent to adjacent oppositely driven surfaces of a second pair of rolls, second blank-positioning means arresting the blank and orienting the same adjacent roll surface of said second roll means and with the second desired corner-break alignment substantially in said second-mentioned tangent plane, blank-engaging means local to substantially said second alignment when thus positioned and movable to advance the blank into frictional engagement with said second rolls means, means continuously driving said second roll means in the direction to pinch and feed the blank along substantially the second tangent plane to the other side of said second roll means, conveyor means in synchronism with said drive means and engaging and advancing successive blanks discharged from said second roll means, and flange-kicker means on the flange-folded side of said conveyor means and synchronized with blank-conveying movement to engage flanges bent by said second roll means and kicking them in the unbending direction.
Claim 18
Independent Claim
325 words
The method of automatically corner-breaking the side-flange edges of a paperboard blank having a central-panel area contiguous to and integral with longitudinally opposed side-flange areas, which comprises selecting three pinch rolls of radius approximating the longitudinal extent of the side-flange areas, orienting said rolls in side-by-side adjacency on parallel axes such that the orientation plane of axes for the first two rolls is substantially transverse to the orientation plane of axes for the second and third rolls, continuously rotating all said rolls with adjacent rolls rotating in opposite directions, positioning an unbroken blank substantially parallel to the first plane and adjacent the first two rolls with the desired corner-break alignment substantially in the plane of tangency to adjacent pinch regions of the first two rolls, said first two rolls being driven in the directions to pinch and draw the blank between said first two rolls, locally urging said blank in the region of said corner-break alignment into frictional engagement with said first two rolls, whereby a first side-flange area is pinched and folded back against the central-panel area of the blank as the blank is fed between said first two rolls, arresting said blank after longitudinal feed thereof by said first two rolls and at a location positioning said blank adjacent the second and third rolls with the second desired corner-break alignment substantially in the plane of tangency to adjacent pinch regions of the second and third rolls, locally urging said blank in the region of said second corner-break alignment into frictional engagement with the second and third of said rolls, whereby the second side-flange area is pinched and folded back against the central-panel area of the blank as the blank is fed between said second and third rolls, providing a supply of blanks available for pick-off of successive blanks from an end of the supply, and successively picking-off and transferring successive blanks from said end and into the position adjacent the first two rolls.
Claim 19
Independent Claim
325 words
The method of automatically corner-breaking the side-flange edges of a paperboard blank having a central-panel area contiguous to and integral with longitudinally opposed side-flange areas, which comprises selecting three pinch rolls of radius approximating the longitudinal extent of the side-flange areas, orienting said rolls in side-by-side adjacency on parallel axes such that the orientation plane of axes for the first two rolls is substantially transverse to the orientation plane of axes for the second and third rolls, continuously rotating all said rolls with adjacent rolls rotating in opposite directions, positioning an unbroken blank substantially parallel to the first plane and adjacent the first two rolls with the desired corner-break alignment substantially in the plane of tangency to adjacent pinch regions of the first two rolls, said first two rolls being driven in the directions to pinch and draw the blank between said first two rolls, locally urging said blank in the region of said corner-break alignment into frictional engagement with said first two rolls, whereby a first side-flange area is pinched and folded back against the central-panel area of the blank as the blank is fed between said first two rolls, arresting said blank after longitudinal feed thereof by said first two rolls and at a location positioning said blank adjacent the second and third rolls with the second desired corner-break alignment substantially in the plane of tangency to adjacent pinch regions of the second and third rolls, locally urging said blank in the region of said second corner-break alignment into frictional engagement with the second and third of said rolls, whereby the second side-flange area is pinched and folded back against the central-panel area of the blank as the blank is fed between said second and third rolls, providing a supply of blanks available for pick-off of successive blanks from an end of the supply, and successively picking-off and transferring successive blanks from said end and into the position adjacent the first two rolls.
Claim 20
Dependent Claim
23 words
The method of claim 16, including the preliminary step of scoring the blank on one side and along both the desired corner-break alignments.
Claim 21
Dependent Claim
49 words
The meThod of claim 16, in which the orientation of roll axes is horizontal, with the third roll beneath and substantially tangent to the plane of tangency to adjacent pinch regions of the first two rolls, whereby blank discharge is downward upon passage by the second and third rolls.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |