US3596317A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making plastic-embedded specimens
Assignee: Individual
•
Filing: 1969-08-15
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Granted: 1971-08-03
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Expires: 1989-08-15
Abstract
Abstract A method and an apparatus for embedding entomological specimens or the like in a clear transparent plastic material, wherein the method comprises positioning the specimen between layers of thermoplastic resin material in granular or powder form and confining the same in a suitable die cavity, with provision for preheating the die cavity, applying heat sufficient to melt the resin without appreciable pressure, placing the melted material under predetermined pressure and heating to a temperature sufficient for polymerization, vacuumizing to remove excess gases, cooling the liquified material to set the same and removing the resultant solid plate from the cavity. The apparatus comprises a female molding member in the form of a rectangular frame adapted to be positioned on a Pyrex glass plate, with electrical means for heating the same, means for circulating a cooling liquid through the walls of the frame, and means for vacuumizing the cavity, and a cooperating male molding member which comprises a punch with heating means and a conduit therein for circulating a cooling fluid which molding member is arranged on a piston for operation by an air cylinder mounted above the female molding member so as to telescope the punch within the die cavity. Provision is made for replacing the mold forming members with other members of different size.
Inventors
- 👤 Donald C Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:51
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/02; B29C33/00; B29C33/02; B29C33/04; B29C43/18; B29C43/32; B29C43/52; B29C70/00; B29C70/68; B29C70/70; B29C35/00; B29C35/02; B29C2035/0211; B29C35/04; B29C35/041; B29C37/00; B29C37/006; B29K; B29K2105/00; B29K2105/25; B29K2105/251
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
225 words
Apparatus for use in embedding specimens in plastic resin material, which material is initially in granular form and is adapted to melt under heat and which polymerizes and sets into solid form under predetermined heat and pressure, said apparatus comprising a lower female mold member in the form of a frame which defines a cavity of greater depth than the thickness desired for the finished product, a support for said female mold frame, said female mold frame having heating means and means forming a conduit through which liquid of predetermined temperature may be circulated to control the temperature of said cavity, said female mold frame having a vacuum connection with openings into said cavity at a predetermined depth to permit withdrawal of air and gases from said cavity when the latter is closed, and an upper male mold member mounted on a reciprocable support above the female mold member and constructed so that it may be moved to telescope, at least in part, into the cavity in said female mold frame and close said cavity, said male mold member having heating means and means forming a conduit through which liquid of predetermined temperature may be circulated to control the temperature of said support for said female mold frame having oppositely disposed members adapted to adjustably clamp said female mold frame thereon, said male mold member.
Claim 2
Dependent Claim
225 words
Apparatus for use in embedding specimens in plastic resin material, which material is initially in granular form and is adapted to melt under heat and which polymerizes and sets into solid form under predetermined heat and pressure, said apparatus comprising a lower female mold member in the form of a frame which defines a cavity of greater depth than the thickness desired for the finished product, a support for said female mold frame, said female mold frame having heating means and means forming a conduit through which liquid of predetermined temperature may be circulated to control the temperature of said cavity, said female mold frame having a vacuum connection with openings into said cavity at a predetermined depth to permit withdrawal of air and gases from said cavity when the latter is closed, and an upper male mold member mounted on a reciprocable support above the female mold member and constructed so that it may be moved to telescope, at least in part, into the cavity in said female mold frame and close said cavity, said male mold member having heating means and means forming a conduit through which liquid of predetermined temperature may be circulated to control the temperature of said support for said female mold frame having oppositely disposed members adapted to adjustably clamp said female mold frame thereon, said male mold member.
Claim 3
Dependent Claim
36 words
Apparatus as set forth in claim 1, and a plate member having a polished surface adapted to be positioned on said support for said female mold frame so as to form a bottom for said cavity.
Claim 4
Dependent Claim
32 words
Apparatus as set forth in claim 1, and said oppositely disposed clamp members forming guide channels for receiving in sliding relation therein and initially positioning said female mold frame and associated members.
Claim 5
Dependent Claim
29 words
Apparatus as set forth in claim 1, and said support for said female mold frame having heating elements and a conduit adapted to receive circulating liquid of predetermined temperature.
Claim 6
Dependent Claim
35 words
Apparatus as set forth in claim 1, and said male mold member being mounted on a baseplate which base plate has heating means and means forming a conduit for circulating fluid of a predetermined temperature.
Claim 7
Dependent Claim
31 words
Apparatus as set forth in claim 1, and the support for said male mold member comprising a fluid cylinder having a piston with means thereon for connecting the male mold member.
Claim 8
Dependent Claim
48 words
Apparatus as set forth in claim 1, and the support for said male mold member comprising a fluid cylinder having a piston and a support block on said piston, and said male mold member having a baseplate and means for detachably connecting said baseplate to said support block.
Claim 9
Dependent Claim
35 words
Apparatus as set forth in claim 7, and said base plate and support block having heating means and means forming a conduit in said base plate with means for connecting to a fluid supply line.
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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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |