US3713952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for heat sealing cartons
Assignee: Fibreboard Corp
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Filing: 1969-10-24
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Granted: 1973-01-30
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Expires: 1989-10-24
Abstract
Abstract An apparatus for heat sealing cartons comprises conveyor means for moving a partially erected carton along a line of flight and folding means for folding polyethylene coated carton closure flaps into superimposed, partially opened relationship. The carton is then moved past a plurality of spaced nozzle means, each comprising a chamber adapted to have a gaseous fuel communicated thereto and ignited therein. Upon combustion of the fuel, a heated fluid is discharged from the chamber, through a nozzle formed on a forward face of the nozzle means and onto the flaps to activate the polyethylene coating for sealing purposes. A driven roller is positioned downstream of the nozzle means to apply a final sealing pressure to the flaps to secure them together.
Inventors
- 👤 G Schafer
- 👤 H Morse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:00
CPC Classifications
B; B65; B65B; B65B51/00; B65B51/10; B65B51/20; B29; B29C; B29C65/00; B29C65/02; B29C65/022; B29C65/10; B29C65/103; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/348; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/43121; B29C66/70; B29C66/72; B29C66/723; B29C66/7232; B29C66/72327; B29C66/72328; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/81; B29C66/816; B29C66/8167; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C53/00; B29C53/36; B29C66/71; B29K; B29K2711/00; B29K2711/12; B29K2711/123; B29L; B29L2031/00; B29L2031/712; B29L2031/7162; B29L2031/7166; B31; B31B; B31B2100/00; B31B2120/00; B31B2120/30; B31B50/00; B31B50/004; B31B50/0044; B31B50/60; B31B50/62; B31B50/64; B31B50/74; B31B50/76; B31B50/78; B31B50/784
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
155 words
In an apparatus for bonding at least one adhesiveLy treated carton flap to an adjacent carton portion, first means for moving said carton along a path and for folding and maintaining said carton flap in spaced relationship relative to said carton portion and second means for bonding said carton flap and said carton portion together comprising at least one nozzle means normally positioned closely adjacent to said path, said nozzle means comprising a combustion chamber means formed therein adapted to have a combustible fuel communicated thereto to generate a heated fluid therein upon ignition of said fuel solely in said combustion chamber means and at least one nozzle formed in said nozzle means solely at a forward end thereof to communicate with said combustion chamber and positioned in juxtaposed relationship to said path for discharging said heated fluid onto said carton flap to activate the adhesive thereon at a temperature level not exceeding approximately 500*F.
Claim 2
Dependent Claim
155 words
In an apparatus for bonding at least one adhesiveLy treated carton flap to an adjacent carton portion, first means for moving said carton along a path and for folding and maintaining said carton flap in spaced relationship relative to said carton portion and second means for bonding said carton flap and said carton portion together comprising at least one nozzle means normally positioned closely adjacent to said path, said nozzle means comprising a combustion chamber means formed therein adapted to have a combustible fuel communicated thereto to generate a heated fluid therein upon ignition of said fuel solely in said combustion chamber means and at least one nozzle formed in said nozzle means solely at a forward end thereof to communicate with said combustion chamber and positioned in juxtaposed relationship to said path for discharging said heated fluid onto said carton flap to activate the adhesive thereon at a temperature level not exceeding approximately 500*F.
Claim 3
Dependent Claim
155 words
In an apparatus for bonding at least one adhesiveLy treated carton flap to an adjacent carton portion, first means for moving said carton along a path and for folding and maintaining said carton flap in spaced relationship relative to said carton portion and second means for bonding said carton flap and said carton portion together comprising at least one nozzle means normally positioned closely adjacent to said path, said nozzle means comprising a combustion chamber means formed therein adapted to have a combustible fuel communicated thereto to generate a heated fluid therein upon ignition of said fuel solely in said combustion chamber means and at least one nozzle formed in said nozzle means solely at a forward end thereof to communicate with said combustion chamber and positioned in juxtaposed relationship to said path for discharging said heated fluid onto said carton flap to activate the adhesive thereon at a temperature level not exceeding approximately 500*F.
Claim 4
Dependent Claim
155 words
In an apparatus for bonding at least one adhesiveLy treated carton flap to an adjacent carton portion, first means for moving said carton along a path and for folding and maintaining said carton flap in spaced relationship relative to said carton portion and second means for bonding said carton flap and said carton portion together comprising at least one nozzle means normally positioned closely adjacent to said path, said nozzle means comprising a combustion chamber means formed therein adapted to have a combustible fuel communicated thereto to generate a heated fluid therein upon ignition of said fuel solely in said combustion chamber means and at least one nozzle formed in said nozzle means solely at a forward end thereof to communicate with said combustion chamber and positioned in juxtaposed relationship to said path for discharging said heated fluid onto said carton flap to activate the adhesive thereon at a temperature level not exceeding approximately 500*F.
Claim 5
Dependent Claim
38 words
The invention of claim 1 wherein said carton portion comprises at least one other carton flap and said first means comprises at least one folding means rotatably mounted in said apparatus for folding said flaps into superimposed relationship.
Claim 6
Dependent Claim
22 words
The invention of claim 1 wherein said first means comprises conveyor means for moving said carton along a horizontally disposed linear path.
Claim 7
Dependent Claim
33 words
The invention of claim 3 wherein said first means further comprises a metallic flap control bar positioned substantially parallel to said linear path for supporting a free edge of said carton flap thereon.
Claim 8
Dependent Claim
81 words
The invention of claim 4 wherein said flap control bar comprises intersecting first and second substantially flat surface portions defining an included angle therebetween selected from the range of from 110* to 170*, said first flat surface portion positioned to at least partially support and guide a corner of said carton thereon whereat said carton flap is hingedly connected to said carton and said second flat surface portion positioned to support and guide the free edge of said carton flap thereon.
Claim 9
Dependent Claim
39 words
The invention of claim 5 wherein said second flat surface portion is positioned below a horizontally disposed plane containing said linear path to define an included angle with said plane selected from the range of from 5* to 30*.
Claim 10
Dependent Claim
17 words
The invention of claim 4 further comprising means for circulating a coolant through said flap control bar.
Claim 11
Dependent Claim
40 words
The invention of claim 4 wherein said first means further comprises a positioning bar means disposed vertically above and in diametric opposition to said flap control bar to have a forward surface portion thereof aid in horizontally positioning said carton.
Claim 12
Dependent Claim
17 words
The invention of claim 8 further comprising means for circulating a coolant through said positioning bar means.
Claim 13
Dependent Claim
28 words
The invention of claim 1 wherein said second means comprises means for selectively communicating said combustible fuel to said nozzle means, said combustible fuel constituting a gas-air mixture.
Claim 14
Dependent Claim
28 words
The invention of claim 3 wherein said second means comprises a plurality of said nozzle means positioned adjacent to said linear path and in substantial parallel relationship therewith.
Claim 15
Dependent Claim
29 words
The invention of claim 11 wherein said nozzle means are each mounted in said apparatus by adjustment means for selectively positioning the nozzles thereof relative to said linear path.
Claim 16
Dependent Claim
45 words
The invention of claim 12 wherein said nozzle means are mounted in said apparatus to position at least one of said nozzles substantially parallel with respect to said linear path and another one of said nozzles at a small angle relative to said linear path.
Claim 17
Dependent Claim
21 words
The invention of claim 1 further comprising adjustment means for selectively moving said nozzle means toward or away from said path.
Claim 18
Dependent Claim
38 words
The invention of claim 14 wherein said adjustment means comprises a hydraulic cylinder pivotally mounted in said apparatus and operatively connected to said nozzle means for selectively moving same in response to retraction Or extension of said cylinder.
Claim 19
Dependent Claim
31 words
The invention of claim 14 wherein said nozzle means is mounted on a housing and wherein said adjustment means adjustably mounts said housing on a member pivotally mounted in said apparatus.
Claim 20
Dependent Claim
25 words
The invention of claim 16 further comprising a hydraulic cylinder pivotally mounted in said apparatus and operatively connected to said member for selectively pivoting same.
Claim 21
Dependent Claim
51 words
The invention of claim 14 further comprising means for selectively communicating said combustible fuel to said nozzle means, including valve means operatively connected to said adjustment means for automatically regulating the amount of fuel communicated to said nozzle means in response to movement of said nozzle means by said adjustment means.
Claim 22
Dependent Claim
32 words
The invention of claim 14 further comprising baffle means mounted in said apparatus for automatically masking said nozzle when said nozzle means is moved away from said path by said adjustment means.
Claim 23
Dependent Claim
24 words
The invention of claim 1 wherein said nozzle means comprises a metallic housing having a refractory material formed therein to define said combustion chamber.
Claim 24
Dependent Claim
31 words
The invention of claim 20 wherein said nozzle means forms an inlet passage therein communicating with said combustion chamber by means of a plurality of orifices formed through said refractory material.
Claim 25
Dependent Claim
36 words
The invention of claim 21 wherein said nozzle comprises a single elongated slot disposed substantially parallel relative to said path, said slot having a cross-sectional area substantially less than a cross-sectional area of said combustion chamber.
Claim 26
Dependent Claim
26 words
The invention of claim 22 further comprising a protective plate attached in overlying relationship to said nozzle means to aid in preventing dissipation of heat thereby.
Claim 27
Dependent Claim
42 words
The invention of claim 1 wherein said second means further comprises a horizontally disposed roller rotatably mounted in said apparatus for rotation about an axis thereof and positioned downstream of said nozzle means for applying a closing pressure to said carton flap.
Claim 28
Dependent Claim
45 words
The invention of claim 24 wherein said roller is rotatably driven and comprises a cylindrical portion for applying said folding pressure and an intersecting flat portion, disposed at an acute angle relative to said axis, for facilitating reception of said carton flap on said roller.
Claim 29
Dependent Claim
34 words
The invention of claim 25 wherein the outer periphery of said cylindrical portion has a substantially constant radius and said flat portion normally forms an angle of approximately 30* with respect to said axis.
Claim 30
Dependent Claim
46 words
The invention of claim 25 wherein said second means further comprises a second horizontally disposed roller rotatably mounted in said apparatus and positioned downstream of said first-mentioned roller and having its top surface portions positioned slightly higher vertically than the cylindrical portion of said first-mentioned roller.
Claim 31
Dependent Claim
90 words
In an apparatus for sealing adhesively treated portions of a package together, the invention comprising nozzle means forming a combustion chamber therein adapted to have a combustible fuel communicated thereto for generating a heated fluid therein upon ignition of said fuel solely in said combustion chamber and at least one nozzle formed in said nozzle means solely at a forward end thereof to communicate with said combustion chamber for discharging said heated fluid onto said package portions to activate the adhesive thereon at a temperature level not exceeding approximately 500*F.
Claim 32
Dependent Claim
90 words
In an apparatus for sealing adhesively treated portions of a package together, the invention comprising nozzle means forming a combustion chamber therein adapted to have a combustible fuel communicated thereto for generating a heated fluid therein upon ignition of said fuel solely in said combustion chamber and at least one nozzle formed in said nozzle means solely at a forward end thereof to communicate with said combustion chamber for discharging said heated fluid onto said package portions to activate the adhesive thereon at a temperature level not exceeding approximately 500*F.
Claim 33
Dependent Claim
56 words
The invention of claim 28 further comprising conveyor means for moving said package along a horizontally disposed linear path and a metallic control bar positioned substantially parallel to said path for supporting and guiding at least one of said package portions thereon, the nozzle of said nozzle means being positioned closely adjacent to said control bar.
Claim 34
Dependent Claim
16 words
The invention of claim 29 further comprising means for circulating a coolant through said control bar.
Claim 35
Dependent Claim
29 words
The invention of claim 28 further comPrising means for selectively communicating said combustible fuel to the combustion chamber of said nozzle means, said combustible fuel constituting a gas-air mixture.
Claim 36
Dependent Claim
18 words
The invention of claim 29 wherein a plurality of said nozzle means are positioned adjacent to said path.
Claim 37
Dependent Claim
18 words
The invention of claim 28 further comprising means for selectively moving said nozzle means relative to said path.
Claim 38
Dependent Claim
36 words
The invention of claim 33 further comprising control means for automatically reducing the amount of combustible fuel communicated to the combustion chamber of said nozzle means when said nozzle means is moved away from said path.
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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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |