US3590435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary molding
Assignee: Philips Maine Corp
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Filing: 1968-06-24
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Granted: 1971-07-06
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Expires: 1988-06-24
Abstract
Abstract Drums are mounted for simultaneous rotation about a first axis and independently about a perpendicular second axis and are adapted to contain molds each having a charge of thermosetting plastic. The drums are mounted on a common shaft through which a heating and cooling medium is separately delivered with one drum being heated while the other drum is being cooled in alternating sequence. A valving arrangement automatically shifts the mediums from one drum to another in automatic controlled sequence whereby one drum is heated while the other is being cooled. The drums are rotated about the common first axis at the same speed while driven about the perpendicular second axis by separate driving means whereby they may be rotated at different speeds about the second axis.
Inventors
- 👤 Philip N Dunham
- 👤 Ansel W Dunham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:20
CPC Classifications
B; B29; B29C; B29C41/00; B29C41/02; B29C41/04; B29C41/06
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
120 words
Rotary molding apparatus, comprising a. at least a pair of drums, b. first support means mounting said drums for rotation about a common first axis, c. independent first drive means operatively connected to said first support means for rotating said drums simultaneously about said first axis, d. second support means mounting each of said drums for independent rotation about a second axis perpendicular to said first axis, e. second drive means operatively connected to each drum for rotating said drums independently of said first drive means and of one another about said second axis, f. air heating and air cooling means operatively connected to said apparatus and, g. control means for delivering heated and cooled air selectively to said drums.
Claim 2
Dependent Claim
120 words
Rotary molding apparatus, comprising a. at least a pair of drums, b. first support means mounting said drums for rotation about a common first axis, c. independent first drive means operatively connected to said first support means for rotating said drums simultaneously about said first axis, d. second support means mounting each of said drums for independent rotation about a second axis perpendicular to said first axis, e. second drive means operatively connected to each drum for rotating said drums independently of said first drive means and of one another about said second axis, f. air heating and air cooling means operatively connected to said apparatus and, g. control means for delivering heated and cooled air selectively to said drums.
Claim 3
Dependent Claim
33 words
Rotary molding apparatus according to claim 1 wherein said second drive means includes a variable speed motor for each drum mounted to said first support means and drivingly connected to its associated drum.
Claim 4
Dependent Claim
33 words
Rotary molding apparatus according to claim 2 wherein each of said drums is formed with teeth about its cylindrical surface and a gear driven by said motor is in mesh with said teeth.
Claim 5
Dependent Claim
40 words
Rotary molding apparatus according to claim 1 wherein each of said drums is formed with an annular shoulder about its cylindrical surface concentric with said second axis and bearing members fixed to said second support means and engaging said shoulder.
Claim 6
Dependent Claim
179 words
Rotary molding apparatus, comprising a. a pair of drums, b. first tubular support means mounting said drums for rotation about a common first axis, c. drive means for rotating said drums simultaneously about said first axis, d. second support means mounting said drums for independent rotation about a second axis perpendicular to said first axis, e. independent drive means operatively connected to each drum for rotating said drum independently of said first drive means and of one another about said second axis, f. conduit means communicating said tubular support with said drums, g. air heating and blowing means for delivering a flow of heated air into one end of said tubular support and cool air delivery means for delivering a flow of cool air into the other end of said tubular support, h. a valve mounted in said tubular support and adapted to direct the heated air selectively into one drum and the cool air into the other drum, and, i. control means for moving said valve to alternate the flow of heated and cool air between the drums.
Claim 7
Dependent Claim
179 words
Rotary molding apparatus, comprising a. a pair of drums, b. first tubular support means mounting said drums for rotation about a common first axis, c. drive means for rotating said drums simultaneously about said first axis, d. second support means mounting said drums for independent rotation about a second axis perpendicular to said first axis, e. independent drive means operatively connected to each drum for rotating said drum independently of said first drive means and of one another about said second axis, f. conduit means communicating said tubular support with said drums, g. air heating and blowing means for delivering a flow of heated air into one end of said tubular support and cool air delivery means for delivering a flow of cool air into the other end of said tubular support, h. a valve mounted in said tubular support and adapted to direct the heated air selectively into one drum and the cool air into the other drum, and, i. control means for moving said valve to alternate the flow of heated and cool air between the drums.
Claim 8
Dependent Claim
175 words
Rotary molding apparatus, comprising a. at least a pair of drums, b. first support means mounting said drums for rotation about a common first axis, c. first drive means for rotatinG said drums about said first axis, d. second support means mounting each of said drums for independent rotation about another axis perpendicular to said first axis, e. independent drive means operatively connected to each drum for rotating each of said drums independently of one another about each drums other axis, f. said first support means including a trunnion formed with parallel passages communicating at one end with at least one of said drums and a forced air heater communication with the other end of said passages for circulating and reheating air through said passages and least one of said drums, and, g. a mold mounted to each of said drums, said mold having its heat transfer surfaces extending within said drum through the wall of said drum, said mold being open and accessible through the drum wall and cover means for closing said mold.
Claim 9
Dependent Claim
175 words
Rotary molding apparatus, comprising a. at least a pair of drums, b. first support means mounting said drums for rotation about a common first axis, c. first drive means for rotatinG said drums about said first axis, d. second support means mounting each of said drums for independent rotation about another axis perpendicular to said first axis, e. independent drive means operatively connected to each drum for rotating each of said drums independently of one another about each drums other axis, f. said first support means including a trunnion formed with parallel passages communicating at one end with at least one of said drums and a forced air heater communication with the other end of said passages for circulating and reheating air through said passages and least one of said drums, and, g. a mold mounted to each of said drums, said mold having its heat transfer surfaces extending within said drum through the wall of said drum, said mold being open and accessible through the drum wall and cover means for closing said mold.
Claim 10
Dependent Claim
30 words
Rotary molding apparatus according to claim 6 wherein said first support means includes at least a pair of roller bearings externally supporting said trunnion for rotation about said first axis.
Claim 11
Dependent Claim
114 words
Rotary molding apparatus, comprising a. at least a pair of drums, b. first support means mounting said drums for rotation about a common first axis, c. second support means mounting said drums for rotation about a second axis perpendicular to said first axis, d. drive means for rotating said drums about said axes, e. a mold mounted to each of said drums, f. said mold having its heat transfer surfaces extending within said drum through the wall of said drums, g. cover means for closing said mold, and, h. means for heating and cooling said drums, i. said drums being formed with openings about said molds for releasing positive cooling pressure from said drum.
Claim 12
Dependent Claim
114 words
Rotary molding apparatus, comprising a. at least a pair of drums, b. first support means mounting said drums for rotation about a common first axis, c. second support means mounting said drums for rotation about a second axis perpendicular to said first axis, d. drive means for rotating said drums about said axes, e. a mold mounted to each of said drums, f. said mold having its heat transfer surfaces extending within said drum through the wall of said drums, g. cover means for closing said mold, and, h. means for heating and cooling said drums, i. said drums being formed with openings about said molds for releasing positive cooling pressure from said drum.
Claim 13
Dependent Claim
84 words
Rotary molding apparatus, comprising a. a cylindrical drum, b. a tubular trunnion mounted for rotation about its longitudinal axis and formed with an offset portion, c. rotary support means mounting said drum in said offset portion perpendicular to said trunnion, d. control means for selectively delivering hot and cool air through said trunnion into said drum, and, e. drive means for rotating said trunnion with said drum about one axis and separately rotating said drum simultaneously about another axis perpendicular to said one axis.
Claim 14
Dependent Claim
84 words
Rotary molding apparatus, comprising a. a cylindrical drum, b. a tubular trunnion mounted for rotation about its longitudinal axis and formed with an offset portion, c. rotary support means mounting said drum in said offset portion perpendicular to said trunnion, d. control means for selectively delivering hot and cool air through said trunnion into said drum, and, e. drive means for rotating said trunnion with said drum about one axis and separately rotating said drum simultaneously about another axis perpendicular to said one axis.
Claim 15
Dependent Claim
109 words
Molding apparatus, comprising a. a mold adapted to receive a charge of thermosetting material b. walls spaced from said mold and forming a vented enclosure thereabouts, c. a cover movably mounted to said walls and detachably supporting said mold, said cover being formed with an opening through which said mold extends, d. a source of heated air and a source of cooled air, e. conduit means connecting said sources to said enclosure, f. control means for selectively delivering heated and cooled air to said enclosure for heating and cooling said charge, and, g. power means for rotating said walls together with said mold about at least two different axes.
Claim 16
Dependent Claim
109 words
Molding apparatus, comprising a. a mold adapted to receive a charge of thermosetting material b. walls spaced from said mold and forming a vented enclosure thereabouts, c. a cover movably mounted to said walls and detachably supporting said mold, said cover being formed with an opening through which said mold extends, d. a source of heated air and a source of cooled air, e. conduit means connecting said sources to said enclosure, f. control means for selectively delivering heated and cooled air to said enclosure for heating and cooling said charge, and, g. power means for rotating said walls together with said mold about at least two different axes.
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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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |