Patent US5050776A successfully refreshed from Google Patents.
US5050776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cartridge heater for foam dispensing apparatus
Assignee: BASF Corp
•
Filing: 1990-01-02
•
Granted: 1991-09-24
•
Expires: 2010-01-02
Abstract
Abstract In a polyurethane foam dispensing apparatus there is provided a foam gun block heater for the isocyanate and the polyol feed lines to prevent cold shots from occuring when the foam dispensing apparatus is initially used.
Inventors
- 👤 William F. Rosenplanter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:10
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/80; B29B7/82; B29B7/826; B29B7/30; B29B7/58; B29B7/60; B29B7/603; B29B7/72; B29B7/728; B29B7/74; B29B7/7438; B29B7/7447; B29B7/823
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
77 words
In a plural component dispensing apparatus for dispensing foam formed from the mixing of plural components supplied through flow channels in a valve block to a mixing chamber for impingement mixing therewithin, the improvement comprising: heating means mounted in and easily removable from the valve block in the dispensing apparatus for heating the mixing chamber within the dispensing apparatus to a desired temperature prior to supplying thereto and the mixing and reaction therewithin of the plural components.
Claim 2
Dependent Claim
77 words
In a plural component dispensing apparatus for dispensing foam formed from the mixing of plural components supplied through flow channels in a valve block to a mixing chamber for impingement mixing therewithin, the improvement comprising: heating means mounted in and easily removable from the valve block in the dispensing apparatus for heating the mixing chamber within the dispensing apparatus to a desired temperature prior to supplying thereto and the mixing and reaction therewithin of the plural components.
Claim 3
Dependent Claim
21 words
The apparatus according to claim 1 wherein the valve block further includes at least one recess to receive the heating means.
Claim 4
Dependent Claim
19 words
The apparatus according to claim 2 wherein the heating means further comprises at least one electrical resistance heater cartridge.
Claim 5
Dependent Claim
32 words
The apparatus according to claim 3 further comprising a resistance heater cartridge within the valve block adjacent each plural component flow channel, each flow channel being connected to an infeed supply line.
Claim 6
Dependent Claim
19 words
The apparatus according to claim 4 wherein the plural components further comprise a polyol component and an isocyanate component.
Claim 7
Dependent Claim
28 words
The apparatus according to claim 5 wherein the polyol component further is supplied from a polyol supply tank connected to the dispensing apparatus by a polyol supply line.
Claim 8
Dependent Claim
28 words
The apparatus according to claim 6 wherein the isocyanate component further is supplied from an isocyanate supply tank connected to the dispensing apparatus by an isocyanate supply line.
Claim 9
Dependent Claim
22 words
The apparatus according to claim 7 wherein the polyol supply line and the isocyanate supply line further are heated by heating means.
Claim 10
Independent Claim
98 words
A method for heating a plural component foam dispensing apparatus to bring at least the mixing chamber in the dispensing apparatus to the temperature of the plural components that are mixed therewithin, comprising: (a) placing heating means within the foam dispensing apparatus to heat the mixing chamber; and (b) activating the heating means to heat the mixing chamber in the foam dispensing apparatus to approximately match the temperature of the plural components prior to the dispensing of an initial shot of foam to achieve a complete reaction and thorough mixing of the plural components within the mixing chamber.
Claim 11
Independent Claim
98 words
A method for heating a plural component foam dispensing apparatus to bring at least the mixing chamber in the dispensing apparatus to the temperature of the plural components that are mixed therewithin, comprising: (a) placing heating means within the foam dispensing apparatus to heat the mixing chamber; and (b) activating the heating means to heat the mixing chamber in the foam dispensing apparatus to approximately match the temperature of the plural components prior to the dispensing of an initial shot of foam to achieve a complete reaction and thorough mixing of the plural components within the mixing chamber.
Claim 12
Dependent Claim
21 words
The method according to claim 9 further comprising using at least one electrical resistance heater cartridge in the foam dispensing apparatus.
Claim 13
Dependent Claim
37 words
The method according to claim 10 further comprising using an isocyanate component and a polyol component as the plural components and feeding the isocyanate component and the polyol component via supply lines to the foam dispensing apparatus.
Claim 14
Dependent Claim
31 words
The method according to claim 11 further comprising placing a heater cartridge adjacent each of the polyol component supply line and the isocyanate component supply line in the foam dispensing apparatus.
Claim 15
Dependent Claim
40 words
The method according to claim 12 further comprising the polyol component supply line and the isocyanate component supply line in the foam dispensing apparatus each having infeed ports which are heated to the temperature of the polyol and isocyanate components.
References Cited (Backward Citations)
US2551078A
Cited
US2976392A
Cited
US3018968A
Cited
US3146950A
Cited
US3458948A
Cited
US3976230A
Cited
US3976230B1
Cited
US4096973A
Cited
US4154368A
Cited
US4170440A
Cited
US4161386A
Cited
US4708292A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-23 | 1995-03-25 | 1995-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-23 | 1999-03-25 | 1999-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-23 | 2003-03-25 | 2003-09-24 | $7700.00 | Window Closed / Lapsed |