US3615723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spray-drying apparatus
Assignee: Damrow Co Inc
•
Filing: 1970-04-15
•
Granted: 1971-10-26
•
Expires: 1990-04-15
Abstract
Abstract Process for drying fluid and solid material in which a liquid spray is introduced into a drying chamber together with a source of dry desiccating gas such as heated air. A screen is positioned to receive the spray while the droplets are in a tacky condition to form a mat on the screen with a provision for drawing air from the heated enclosure through the mat and thence through the screen for the purpose of drying the mat. At least portions of the mat are subdivided into a particulate form and recirculated back to the inlet of the apparatus where they are mixed with fresh incoming product.
Inventors
- 👤 Reginald E Meade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:43
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/16; B01D1/18; A; A23; A23B; A23B2/00; A23B2/90; A23B2/91; A23B2/93; F; F26; F26B; F26B3/00; F26B3/02; F26B3/10; F26B3/12; Y; Y10; Y10S; Y10S159/00; Y10S159/03
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
15 words
The process according to claim 1 wherein the returned material is reduced to powdered form.
Claim 2
Dependent Claim
30 words
The process according to claim 1 wherein the returned material is mixed with relatively large food pieces, said food pieces being deposited upon the collection member with the returned material.
Claim 3
Dependent Claim
13 words
The process according to claim 1 wherein the drying atmosphere comprises heated air.
Claim 4
Dependent Claim
19 words
The process according to claim 1 wherein said foraminous collecting member comprises an endless conveyor composed of perforated panels.
Claim 5
Dependent Claim
39 words
The process according to claim 5 wherein said conveyor is moved during the operation of said process and said mat is continuously removed from the conveyor to continuously provide a fresh collection surface for receiving said partially dried droplets.
Claim 6
Dependent Claim
51 words
The process according to claim 1 wherein a preliminary coating layer formed from the returned particulate material is applied to said foraminous collecting member, said collection member is an elongated moving conveyor element and the particulate material is placed on the conveyor before said conveyor is exposed to the drying atmosphere.
Claim 7
Dependent Claim
27 words
The process according to claim 1 wherein said mat and said screen is moved to a cooling zone and said mat is refrigerated within said cooling zone.
Claim 8
Dependent Claim
12 words
The process of claim 3 wherein the food pieces are fruit pieces.
Claim 9
Dependent Claim
12 words
The process of claim 3 wherein the food pieces are vegetable pieces.
Claim 10
Dependent Claim
11 words
The process of claim 1 wherein the solid component is sucrose.
Claim 11
Dependent Claim
11 words
The process of claim 9 wherein the solid component comprises sucrose.
Claim 12
Dependent Claim
11 words
The process of claim 10 wherein the solid component comprises dextrin.
Claim 13
Dependent Claim
37 words
The process of claim 1 wherein a dry pulverulent substance is blown into the drying atmosphere and intimately intermixed with the droplets therein and the dry finished mat is not returned and deposited on the foraminous member.
Claim 14
Dependent Claim
151 words
A process for drying fluids containing liquid and solid components comprising providing a foraminous collecting member, dispersing minute droplets of the fluid in a drying atmosphere, allowing the droplets to partially dry to the point where the surfaces are in a tacky condition by the time the droplets reach said foraminous collecting member, introducing a particulate solid material onto the foraminous member in proximity with the droplets to thereby cause said particulate material to be deposited upon the foraminous member with said droplets, establishing a pressure differential across the foraminous member to thereby draw aT least a portion of the drying atmosphere through said member and collect said tacky droplets and particulate solid material on the foraminous member as a porous lacy mat characterized by the ability to allow further drying atmosphere to pass therethrough, continuing to pass drying atmosphere through said mat until the desired degree of dryness is reached.
References Cited (Backward Citations)
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US2085691A
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US2730933A
Cited
US3010215A
Cited
US3212908A
Cited
US2981629A
Cited
US3415665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |