US3831342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming sift proof glued flap seals for cartons
Assignee: Pillsbury Co
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Filing: 1973-01-22
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Granted: 1974-08-27
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Expires: 1993-01-22
Abstract
Abstract An adhesive applicator is described which includes five adhesive applying nozzles for placing beads of fluid adhesive on a line of moving cartons. Four of the nozzles are moved diagonally with respect to the path along which cartons are moved beneath the adhesive applicator. One nozzle is stationary and is used to produce a straight line of adhesive paralleling the path of motion. The moving nozzles are mounted just above the flaps of the carton which are held in a horizontal position. Each moving nozzle is mounted on a pivot axis positioned above the nozzle opening and oriented at an angle of approximately 30* to the direction of carton motion so that relative movement between the carton and nozzle is at right angles to the main axis of the carton producing a bead across the flaps which is positioned perpendicular to the direction of carton travel. In this manner, an adhesive bead of considerable thickness and of just the desired pattern is applied to the flaps while the cartons move continuously below the glue nozzles. When the flaps are folded inwardly one after the other, the pressure on the adhesive beads causes a squeezing out of adhesive into all the voids of the flap contact area thereby producing a sift proof seal.
Inventors
- 👤 J Rejsa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:31
CPC Classifications
B; B65; B65B; B65B7/00; B65B7/16; B65B7/20; B65B51/00; B65B51/02; B65B51/023
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
216 words
A method of providing a sift proof carton comprising; providing a carton having four end flaps on one end thereof, placing a first pair of opposing flaps in an outwardly spread position and the other two opposing flaps in an inwardly folded position adapted to receive adhesive on their exposed surfaces, advancing the carton on an axis parallel to the edges of the flaps, applying adhesive to the exposed surfaces in the form of beads at each end of each of the first pair of flaps having a cross-sectional height which is on the same order as the width thereof along two lines extending at right angles to the axis of motion of the carton, applying another bead of adhesive to one of the first pair of flaps along a line running parallel to the fold lines of the first pair and extending from the bead of adhesive at one end to the bead of adhesive at the other end, folding the first pair of flaps onto the other flaps to thereby press the beads of adhesive onto themselves and spread the adhesive between the flaps to thereby force at least part of the adhesive into the interstices between the folds of the flaps to provide a carton resistant to the sifting of powdered contents therein.
Claim 2
Independent Claim
216 words
A method of providing a sift proof carton comprising; providing a carton having four end flaps on one end thereof, placing a first pair of opposing flaps in an outwardly spread position and the other two opposing flaps in an inwardly folded position adapted to receive adhesive on their exposed surfaces, advancing the carton on an axis parallel to the edges of the flaps, applying adhesive to the exposed surfaces in the form of beads at each end of each of the first pair of flaps having a cross-sectional height which is on the same order as the width thereof along two lines extending at right angles to the axis of motion of the carton, applying another bead of adhesive to one of the first pair of flaps along a line running parallel to the fold lines of the first pair and extending from the bead of adhesive at one end to the bead of adhesive at the other end, folding the first pair of flaps onto the other flaps to thereby press the beads of adhesive onto themselves and spread the adhesive between the flaps to thereby force at least part of the adhesive into the interstices between the folds of the flaps to provide a carton resistant to the sifting of powdered contents therein.
Claim 3
Independent Claim
187 words
An apparatus for dispensing adhesive for sealing a carton to provide a sift proof seal therein comprising in combination conveyor means for advancing the cartons in an upright position, means for holding the side flaps in a horizontally disposed laterally extending position and the end flaps in a horizontal position extending centrally from the edges of the top of the carton, movable nozzle means for expelling adhesive onto the flaps, valve means for the nozzle, said nozzles being adapted to move along an axis positioned obliquely to the axis of movement of the cartons, m eans for sensing the position of said cartons in succession and operatively connected to the valve means, the valve means being connected to the nozzles for starting and stopping the flow of adhesive therethrough, stationary nozzle means positioned to apply a bead of adhesive along the length of one of the side flaps whereby actuation of the sensing means controls the flow of adhesive from the moving nozzles onto the exposed surfaces of the flaps to form a bead located adjacent to both the leading and the trailing end of the carton.
Claim 4
Independent Claim
187 words
An apparatus for dispensing adhesive for sealing a carton to provide a sift proof seal therein comprising in combination conveyor means for advancing the cartons in an upright position, means for holding the side flaps in a horizontally disposed laterally extending position and the end flaps in a horizontal position extending centrally from the edges of the top of the carton, movable nozzle means for expelling adhesive onto the flaps, valve means for the nozzle, said nozzles being adapted to move along an axis positioned obliquely to the axis of movement of the cartons, m eans for sensing the position of said cartons in succession and operatively connected to the valve means, the valve means being connected to the nozzles for starting and stopping the flow of adhesive therethrough, stationary nozzle means positioned to apply a bead of adhesive along the length of one of the side flaps whereby actuation of the sensing means controls the flow of adhesive from the moving nozzles onto the exposed surfaces of the flaps to form a bead located adjacent to both the leading and the trailing end of the carton.
Claim 5
Dependent Claim
92 words
The apparatus according to claim 2 wherein the nozzles are mounted for pivotal movement along axes extending at an oblique angle with respect to the axis of carton movement and the side edges of the carton flaps, each nozzle includes a nozzle opening positioned in spaced relationship from its axis of pivotal movement, linkage means connected to the nozzles and actuating means operatively connected to the linkage for oscillating the free ends of the nozzles and means for operating the actuating means in timed relationship with the conveyor for advancing the cartons.
Claim 6
Dependent Claim
30 words
The apparatus of claim 3 wherein the actuating means comprises a rotating cam in operative engagement with said link means and means to force the link means against the cam.
Claim 7
Dependent Claim
223 words
The apparatus of claim 2 wherein five nozzles are provided, one being stationary and the other four comprising moving nozzles positioned for pivotal movement on parallel axes oriented obliquely with respect to the hinge connection between the side flaps and the carton, the moving nozzles comprising a first pair positioned to deposit adhesive adjacent the leading edges of the side flaps and a second pair positioned to deposit adhesive adjacent to the trailing edges of the same flaps, the nozzle openings being positioned between the pivot axes and the flaps, means for simultaneously oscillating the nozzles in the same direction, means operatively associated between the nozzle oscillating means and the conveyor for synchronizing the conveyor and the nozzle oscillating means, means communicating with the nozzles for supplying adhesive to the nozzles, said valve means starting and interrupting the flow of adhesive through the nozzles in timed relationship with movement of the nozzles in a selected direction while the nozzles are positioned adjacent the ends of the flaps, and a means for starting and interrupting the flow of adhesive through the stationary nozzle when the corresponding flap passes into proximity with the stationary nozzle to thereby deposit a strip of adhesive extending from one end to the other of one side flap on an axis parallel to the fold line of the side flap.
Claim 8
Dependent Claim
58 words
The apparatus of claim 5 wherein the adhesive applied from the moving nozzles is deposited in a ribbon extending substantially from the free marginal edge of the side flaps centrally of the carton and onto the outside surface of the adjacent end flaps and in overlapping relationship with the interstice between the side flaps and the end flaps.
References Cited (Backward Citations)
US1929896A
Cited
US1976980A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |