US3794451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Introduction of reactants into moulds
Assignee: Bayer AG
•
Filing: 1971-06-21
•
Granted: 1974-02-26
•
Expires: 1991-06-21
Abstract
Abstract In the production of moulded articles wherein reactants are combined, react, and form the material, e.g. foam, composing the article, filling the mould, a mixing chamber for the reactants is combined with the mould. The reactants are introduced and mix in the mixing chamber and issue therefrom into the mould where they react for the formation of the article. In the reaction the mixing chamber can become integrated with the article. The mould can be a shell which becomes integrated with the material produced by the reaction, forming an outer skin of the article.
Inventors
- 👤 K Breer
- 👤 K Schulte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:05
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/74; B29B7/7471
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
152 words
Apparatus suitable for production of composite articles having an outer skin filled with material moulded therein which comprises: a. a hollow shell to form the outer skin providing a cavity for moulding of said material within the shell; b. a gun for delivery of a plurality of separate components to the hollow shell having a discharge barrel for discharge of the components into the hollow shell for the moulding; and c. a mixing chamber assembled with the hollow shell for integration with the article, said mixing chamber being disposed so as to extend from the surface of said shell into its cavity and being joined to the hollow shell and being shaped to cooperate with said gun so as to seal said chamber off from the surroundings and having an outlet opening for discharge of the components after mixing thereof in the mixing chamber, into the cavity for formation of the article.
Claim 2
Dependent Claim
152 words
Apparatus suitable for production of composite articles having an outer skin filled with material moulded therein which comprises: a. a hollow shell to form the outer skin providing a cavity for moulding of said material within the shell; b. a gun for delivery of a plurality of separate components to the hollow shell having a discharge barrel for discharge of the components into the hollow shell for the moulding; and c. a mixing chamber assembled with the hollow shell for integration with the article, said mixing chamber being disposed so as to extend from the surface of said shell into its cavity and being joined to the hollow shell and being shaped to cooperate with said gun so as to seal said chamber off from the surroundings and having an outlet opening for discharge of the components after mixing thereof in the mixing chamber, into the cavity for formation of the article.
Claim 3
Dependent Claim
20 words
Apparatus according to claim 1, the mixing chamber being formed as one piece with at least part of the mould.
Claim 4
Dependent Claim
18 words
Apparatus according to claim 1, the mixing chamber being an insert installed in an opening in the mould.
Claim 5
Dependent Claim
25 words
Apparatus according to claim 1, the mixing chamber having a closure closing the inlet end thereof for receiving the discharge end of said discharge barrel.
Claim 6
Dependent Claim
30 words
Apparatus according to claim 4, the discharge barrel of the gun having means for piercing the closure for forming openings therein for passage of the components into the mixing chamber.
Claim 7
Dependent Claim
36 words
Apparatus according to claim 1, the mixing chamber having a closure having an opening therein for registering with the discharge barrel of the gun for passage of the compounds through said opening into the mixing chamber.
Claim 8
Dependent Claim
49 words
Apparatus according to claim 1, the mixing chamber having a closure closing the inlet end thereof, said closure being deformable by pressure, the closure being dished so that upon deformation by pressure within the mixing chamber it is deformed for conforming thereof with the shape of the article produced.
Claim 9
Dependent Claim
26 words
Apparatus according to claim 1, the gun having two passageways for respective component, said two passageways being concentrically arranged, adjacent the discharge of the gun barrel.
Claim 10
Dependent Claim
31 words
Apparatus according to claim 1, the gun having a half coupling, the mixing chamber having a half coupling, said couplings being interengagable to secure the gun in place in the mould.
Claim 11
Dependent Claim
17 words
Apparatus according to claim 9, the half couplings comprising a cooperating tongue and groove for said interengagement.
Claim 12
Dependent Claim
20 words
Apparatus according to claim 9, the half couplings comprising cooperating bolts and catches of a bayonet joint for said interengagement.
Claim 13
Dependent Claim
44 words
Apparatus according to claim 9, the gun barrel being outfitted with an outer sleeve rotatable about the axis of the barrel, said half coupling of gun being mounted on said sleeve, said interengagement being effected by aligning the half couplings and rotating the sleeve.
Claim 14
Dependent Claim
26 words
Apparatus according to claim 9, said opening of the mixing chamber being offset from the path of the reactants into the mixing chamber from the gun.
Claim 15
Dependent Claim
15 words
Apparatus according to claim 3, the insert being installed on the mould by snap fit.
Claim 16
Dependent Claim
17 words
Apparatus according to claim 1, the mixing chamber having an elastic closure closing the inlet end thereof.
Claim 17
Dependent Claim
127 words
Apparatus suitable for moulding of articles wherein components are combined and form the material composing the article filling the mould which comprises: a. the mould; b. a gun for delivery of the components to the mould, having a discharge barrel for discharge of the components for the moulding; c. a mixing chamber assembled with the mould adapted to receive the components from the gun and having an outlet opening for discharge of the components after mixing thereof in the mixing chamber, into the mould for formation of the article; d. the mixing chamber having a closure closing the inlet end thereof; e. the discharge barrel of the gun having means for piercing the closure for forming openings therein for passage of the components into the mixing chamber.
Claim 18
Dependent Claim
127 words
Apparatus suitable for moulding of articles wherein components are combined and form the material composing the article filling the mould which comprises: a. the mould; b. a gun for delivery of the components to the mould, having a discharge barrel for discharge of the components for the moulding; c. a mixing chamber assembled with the mould adapted to receive the components from the gun and having an outlet opening for discharge of the components after mixing thereof in the mixing chamber, into the mould for formation of the article; d. the mixing chamber having a closure closing the inlet end thereof; e. the discharge barrel of the gun having means for piercing the closure for forming openings therein for passage of the components into the mixing chamber.
Claim 19
Dependent Claim
133 words
Apparatus suitable for moulding of articles wherein components are combined, and form the material composing the article filling the mould which comprises: a. the mould; b. a gun for delivery of the components to the mould, having a discharge barrel for discharge of the components for the moulding; c. a mixing chamber assembled with the mould adapted to receive the components from the gun and having an outlet opening for discharge of the components after mixing thereof in the mixing chamber, into the mould for formation of the article, the mixing chamber having a closure closing the inlet end thereof, said closure being deformable by pressure, the closure being dished so that upon deformation by pressure within the mixing chamber it is deformed for conforming thereof with the shape of the article produced.
Claim 20
Dependent Claim
133 words
Apparatus suitable for moulding of articles wherein components are combined, and form the material composing the article filling the mould which comprises: a. the mould; b. a gun for delivery of the components to the mould, having a discharge barrel for discharge of the components for the moulding; c. a mixing chamber assembled with the mould adapted to receive the components from the gun and having an outlet opening for discharge of the components after mixing thereof in the mixing chamber, into the mould for formation of the article, the mixing chamber having a closure closing the inlet end thereof, said closure being deformable by pressure, the closure being dished so that upon deformation by pressure within the mixing chamber it is deformed for conforming thereof with the shape of the article produced.
Claim 21
Dependent Claim
13 words
Apparatus according to claim 1, the mixing chamber being a stirrerless mixing chamber.
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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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |