US3897011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic waste converter
Assignee: Individual
•
Filing: 1973-11-12
•
Granted: 1975-07-29
•
Expires: 1993-11-12
Abstract
Abstract A method and apparatus for converting thermoplastic waste material into a commercial-grade granular material wherein the waste material is introduced into a chamber containing a rotating cutter which shreds and frictionally heats the thermoplastic material which is thereafter cooled by cooling water added to the material while the cutting operation continues. The cooling water or vapor is then withdrawn or exhausted from the container under negative pressure leaving the granular material dry. Also, solvents are removed from the material. The cutter blade may include baffle bars which provide frictional heating surfaces for heating the thermoplastic waste material.
Inventors
- 👤 Bob P Gray
- 👤 James A Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:10
CPC Classifications
B; B29; B29B; B29B17/00; B29B17/04; B29B17/0412; B02; B02C; B02C18/00; B02C18/06; B02C18/08; B02C18/086; B29B2017/0424; B29B2017/048; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
108 words
A METHOD OF PROCESSING THERMOPLASTIC FILM MTERIAL TO CONVERT IT INTO GRAULAR FORM COMPRISING THE STEP OF: A. PLACING A FIRST BATCH OF APPROXIMATELY THIRTY POUNDS OF THERMOPLASTIC FOIL MATERIAL INTO A CONTAINER HAVING A CUTTING BLADE ROTATING THEREIN AT A SPEED OF APPROXIMATELY 1800 R.P.M, B. PLACING A SECOND BATCH OF APPROXIMATELY SEVENTY TO EIGHTY POUNDS OF THERMOPLASTIC FOIL MATERIAL IN SAID CONTAINER APPROXIMATELY ONE MINUTE AFTER SAID FIRST BATCH IS PLACED. IN SAID CONTAINER WITH SAID BLADE CONTINUING TO ROTATE IN SAID CONTAINER, C. RROTATING SAID BLADE IN SAID CONTAINER FOR A PERIOD OF APPROXIMATELY 22 SECONDS AFTER SAID SECONDD BATCH IS PLACED IN SAID CONTAINER,
Claim 2
Independent Claim
108 words
A METHOD OF PROCESSING THERMOPLASTIC FILM MTERIAL TO CONVERT IT INTO GRAULAR FORM COMPRISING THE STEP OF: A. PLACING A FIRST BATCH OF APPROXIMATELY THIRTY POUNDS OF THERMOPLASTIC FOIL MATERIAL INTO A CONTAINER HAVING A CUTTING BLADE ROTATING THEREIN AT A SPEED OF APPROXIMATELY 1800 R.P.M, B. PLACING A SECOND BATCH OF APPROXIMATELY SEVENTY TO EIGHTY POUNDS OF THERMOPLASTIC FOIL MATERIAL IN SAID CONTAINER APPROXIMATELY ONE MINUTE AFTER SAID FIRST BATCH IS PLACED. IN SAID CONTAINER WITH SAID BLADE CONTINUING TO ROTATE IN SAID CONTAINER, C. RROTATING SAID BLADE IN SAID CONTAINER FOR A PERIOD OF APPROXIMATELY 22 SECONDS AFTER SAID SECONDD BATCH IS PLACED IN SAID CONTAINER,
Claim 3
Dependent Claim
161 words
In an apparatus for converting thermoplastic foil material into granulated thermoplastic, including: a. a cylindrical container having a top and a bottom; b. motor means mounted below said bottom for rotating a shaft extending through said bottom and disposed substantially axially of said cylindrical container; c. a plurality of circumferentially spaced fixed blades mounted at the wall of said cylinder and projecting radially inwardly and above the bottom of said cylinder, the improvement comprising: a rotatable blad member mounted on the shaft of said motor and extending diametrically of said cylinder below said fixed blades, said rotatable blade member having sharpened leading cutting edges on opposite sides of said shaft for cutting thermoplastic material in said cylinder and said sharpened leading edge being inclined with respect to the center line of said blade member; further said rotatable blade having a sharpened cutting edge extending along each end of said blade member and tapered outwardly and rearwardly of said leading cutting edge.
Claim 4
Dependent Claim
161 words
In an apparatus for converting thermoplastic foil material into granulated thermoplastic, including: a. a cylindrical container having a top and a bottom; b. motor means mounted below said bottom for rotating a shaft extending through said bottom and disposed substantially axially of said cylindrical container; c. a plurality of circumferentially spaced fixed blades mounted at the wall of said cylinder and projecting radially inwardly and above the bottom of said cylinder, the improvement comprising: a rotatable blad member mounted on the shaft of said motor and extending diametrically of said cylinder below said fixed blades, said rotatable blade member having sharpened leading cutting edges on opposite sides of said shaft for cutting thermoplastic material in said cylinder and said sharpened leading edge being inclined with respect to the center line of said blade member; further said rotatable blade having a sharpened cutting edge extending along each end of said blade member and tapered outwardly and rearwardly of said leading cutting edge.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |