US4021287A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for flame bonding by use of high velocity, high temperature direct flame
Assignee: Consolidated Bathurst Ltd
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Filing: 1975-09-09
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Granted: 1977-05-03
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Expires: 1995-09-09
Abstract
Abstract An apparatus for obtaining rapid bonding of thermoplastic materials to themselves or other similar or different materials by means of a high velocity high temperature direct flame in combination with pressure. This achieves a sufficiently rapid treatment so that the properties of the materials are not substantially detrimentally affected. Thin laminates of highly oriented materials can be bonded without loss of strength characteristics.
Inventors
- 👤 Wilhelm N. Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:03
CPC Classifications
B; B32; B32B; B32B38/00; B32B38/0036; B29; B29C; B29C65/00; B29C65/02; B29C65/10; B29C65/106; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/45; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/81; B29C66/814; B29C66/8145; B29C66/81457; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C66/83413; B32B27/00; B32B27/06; B32B27/08; B29C66/71; B29C66/72; B29C66/723; B29C66/812; B29C66/8126; B29C66/81264; B29K; B29K2995/00; B29K2995/0037; B29K2995/007; B29L; B29L2009/00; B32B2309/00; B32B2309/02; B32B2309/14; B32B2310/00; B32B2310/04; B32B2310/0445
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
192 words
An apparatus suitable for bonding materials together comprising bonding means, means for supplying a supply of at least one bondable thermoplastic material and at least one further material to said bonding means, burner means, said burner means comprising at least two rows of burners in a staggered relationship to each other to obtain a substantially continuous and uniform temperature line across the width of the material being treated, means for supplying said burners with a combustible fuel, said supply means being adapted to supply said burners such that when said combustible fuel is burnt, said burners produce a flame having a flame velocity of about 10,000 feet per minute at a temperature of above 1,000° F., said burners being directed such that the flames will heat at least a surface of said bondable thermoplastic material immediately prior to entering the bonding means whereby the heated surface is bonded to the further material to form a substantially uniformly bonded laminate, and wherein said burners are arranged in such a manner that the flames from adjacent burners overlap each other so as to aid in levelling out the temperature profile of the overall flame.
Claim 2
Independent Claim
192 words
An apparatus suitable for bonding materials together comprising bonding means, means for supplying a supply of at least one bondable thermoplastic material and at least one further material to said bonding means, burner means, said burner means comprising at least two rows of burners in a staggered relationship to each other to obtain a substantially continuous and uniform temperature line across the width of the material being treated, means for supplying said burners with a combustible fuel, said supply means being adapted to supply said burners such that when said combustible fuel is burnt, said burners produce a flame having a flame velocity of about 10,000 feet per minute at a temperature of above 1,000° F., said burners being directed such that the flames will heat at least a surface of said bondable thermoplastic material immediately prior to entering the bonding means whereby the heated surface is bonded to the further material to form a substantially uniformly bonded laminate, and wherein said burners are arranged in such a manner that the flames from adjacent burners overlap each other so as to aid in levelling out the temperature profile of the overall flame.
Claim 3
Dependent Claim
15 words
The apparatus of claim 1 wherein said bonding means includes a pair of nip rolls.
Claim 4
Dependent Claim
41 words
The apparatus of claim 1, wherein said burners are not pointing directly at the nip of said nip rolls but are angled such that the combustion products of said flame will have a greater opportunity to escape from the nip area.
Claim 5
Dependent Claim
27 words
The apparatus of claim 1 wherein said rows of burners are angled at an angle of between about 55° and about 60° with respect to each other.
Claim 6
Dependent Claim
69 words
The apparatus of claim 1 wherein said bondable thermoplastic material and said further material comprise at least a layer of the same, said bonding means including a pair of small diameter nip rolls and a pair of large diameter nip rolls, said small pair of rolls being located in advance of said large pair of rolls in the direction of movement of said bondable thermoplastic material and further material.
Claim 7
Dependent Claim
88 words
The apparatus of claim 5 wherein said small pair of rolls are spaced apart from each other so as to form a wedge-shaped area defined by the nip of said large nip rolls, and the layers of thermoplastic and further material passing over said small pair of rolls such that the flames from said burners directed to said wedge-shaped area will have an opportunity to mix and spread out and thereby tend to level out the temperature profile of the overall flame and yield a more uniform bond.
Claim 8
Dependent Claim
31 words
The apparatus of claim 1, wherein said apparatus further includes means to cool the outer surface of said burners and to cool said bonding means and to cool said bonded laminate.
Claim 9
Dependent Claim
46 words
The apparatus of claim 7, wherein said means to cool said surface and said bonding means constitutes a first cooling means and said means to cool said laminate constitutes a second cooling means and wherein said first cooling means is separate from said second cooling means.
Claim 10
Dependent Claim
49 words
The apparatus of claim 8, wherein said means to cool is a water cooling system and the water temperature of said first cooling means is not substantially lower than room temperature nor higher than 212° F. and the water temperature of said second cooling means is below room temperature.
Claim 11
Independent Claim
238 words
An apparatus suitable for bonding materials together comprising bonding means including a pair of adjustable nip rolls having a nip opening between the nip rolls, means for supplying a supply of at least one bondable thermoplastic material and at least one further material to said bonding means, burner means, said burner means comprising at least two rows of burners in a staggered relationship to each other to obtain a substantially continuous and uniform temperature line across the width of the material being treated, said rows of burners being angled at an angle of between about 55° and about 60° with respect to each other, means for supplying said burners with a combustible gaseous fuel, said supply means being adapted to supply said combustible fuel to said burners such that when said combustible fuel is burnt, said burners produce a flame having a flame velocity of above 10,000 feet per minute at a temperature of above 1000° F., means associated with said burners whereby the flames contain water vapor, said nip rollers being adjustable whereby they may be adjusted to have a nip opening substantially equal to one-half the depth of the flame produced by said burners, said burners being directed such that the flames will heat at least a surface of said bondable thermoplastic material prior to entering the bonding means whereby the heated surface is bonded to the further material to form a substantially uniformly bonded laminate.
Claim 12
Independent Claim
238 words
An apparatus suitable for bonding materials together comprising bonding means including a pair of adjustable nip rolls having a nip opening between the nip rolls, means for supplying a supply of at least one bondable thermoplastic material and at least one further material to said bonding means, burner means, said burner means comprising at least two rows of burners in a staggered relationship to each other to obtain a substantially continuous and uniform temperature line across the width of the material being treated, said rows of burners being angled at an angle of between about 55° and about 60° with respect to each other, means for supplying said burners with a combustible gaseous fuel, said supply means being adapted to supply said combustible fuel to said burners such that when said combustible fuel is burnt, said burners produce a flame having a flame velocity of above 10,000 feet per minute at a temperature of above 1000° F., means associated with said burners whereby the flames contain water vapor, said nip rollers being adjustable whereby they may be adjusted to have a nip opening substantially equal to one-half the depth of the flame produced by said burners, said burners being directed such that the flames will heat at least a surface of said bondable thermoplastic material prior to entering the bonding means whereby the heated surface is bonded to the further material to form a substantially uniformly bonded laminate.
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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) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |