Patent NL7905922A successfully refreshed from Google Patents.
Patent US3619353A successfully refreshed from Google Patents.
US3619353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for moulding multilayered fibrous articles having layers of different fibrous materials
Assignee: Specialty Materials Inc
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Filing: 1968-09-20
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Granted: 1971-11-09
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Expires: 1988-09-20
Abstract
Abstract Apparatus and method for pulp moulding a fibrous article including a tank containing a first slurry of fibrous material, a foraminous die connected to a rod and cylinder for moving the die into and out of the first slurry in the tank on which the article is formed, a sleeve connected to a rod and cylinder for moving the sleeve into and out of the first slurry in the tank, the sleeve functioning to isolate the die from the first slurry in the tank, and hoses connected to the sleeve for supplying a second slurry of fibrous material to the area between the sleeve and the die in order that the accreted product be composed of layers of varying fiber constituents.
Inventors
- 👤 John Covington Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:12
CPC Classifications
D; D21; D21J; D21J3/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
132 words
The method of forming a multilayer accretion on a die without permitting exposure of said accretion to air which comprises immersing said die into a first liquid slurry containing accretable material, applying a vacuum through the interior of said die and causing deposit of said material on said die, surrounding said die with a movable sleeve having a cavity and isolating said die from said first slurry in the cavity of said movable sleeve, while simultaneously supplying a quantity of a second liquid slurry containing accretable material to said cavity while continuing application of the vacuum through said die and accreting a desired quantity of said second material onto said previously deposited accretion removing said die from said cavity and said first liquid slurry to provide access to the produced multilayer accretion.
Claim 2
Dependent Claim
117 words
In the process of accreting particulate material onto a die from a first slurry thereof contained in a tank into which said die is immersed, said die having a vacuum applied therethrough during such accretion, the improvement comprising providing in said tank a second slurry of accretable material and a movable sleeve surrounding said die and movable with respect to said tank and said die, said second slurry being contained in said sleeve wherein said die may be surrounded and isolated from said first mentioned slurry while a quantity of said second slurry is being accreted onto said die whereby the resultant product of such accretion comprises a multilayer deposit of both said first and second materials.
Claim 3
Dependent Claim
30 words
The invention according to claim 3 characterized by said die being continuously immersed in liquid from the commencement of accretion to the completion thereof in any one complete operating cycle.
Claim 4
Dependent Claim
111 words
In the process of accreting onto a movable die member having a foraminous area an article comprising deposits from a plurality of slurries furnished at least in part serially to said area, the improvement whereby one of said slurries is contained in a tank and another of said slurries is contained in a movable sleeve member immersible at least in part in said one slurry and whereby said die and sleeve members are relatively movable, the movement of one of said members relative to the other causing said area to be alternately exposed to and isolated from said one slurry and in the reverse sequence to the other of said slurries.
Claim 5
Dependent Claim
109 words
Apparatus for accreting onto a die having a foraminous area an article deposited from a plurality of slurries comprising a tank containing a first slurry, means for moving a die within said tank so as to be immersed within said first slurry, sleeve means for isolating said die from said first slurry while immersed therein, means connected to said sleeve means for moving said sleeve means into and out of said tank, means for supplying a second slurry to the area between the isolated die and the sleeve means, and means connected to said die for applying a vacuum therethrough and causing deposit of accretable material on said die.
Claim 6
Dependent Claim
45 words
The apparatus according to claim 6 wHerein said sleeve is secured to said tank and is partly above and partly immersed in said slurry, and wherein the means for moving said die into and out of said tank moves said die in a vertical direction.
References Cited (Backward Citations)
US1918782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |