Patent US4159817A successfully refreshed from Google Patents.
US4159817A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold for manufacturing distillation column packing
Assignee: Tokyo Special Wire Netting Co Ltd
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Filing: 1978-05-24
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Granted: 1979-07-03
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Expires: 1998-05-24
Abstract
Abstract A distillation column packing in the form of a spherical body constructed by assembling a pair of hemispherical members of the same shape and structure. Each of the hemispherical members includes a suitable number of cutout openings formed in the hemispherical surface portion thereof to leave covering portions, a plurality of mating assembly posts and tubes formed in the hollow inside of the hemispherical member, and reinforcing and gas-liquid contact area increasing contact pieces formed to connect the posts and the tubes with one another but not to close the hollow inside of the hemispherical member. The packing thus constructed is best suited for use in distillation columns.
Inventors
- 👤 Reiji Ikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:23
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/30; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B01J2219/00; B01J2219/30; B01J2219/302; B01J2219/30207; B01J2219/304; B01J2219/30466; Y; Y10; Y10S; Y10S261/00; Y10S261/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
290 words
An apparatus for manufacturing one subassembly which can be joined to another subassembly of the same structure to form a spherical distillation column packing, comprising: a female mold part having a hemispherical cavity and an inlet port for feeding moldable material into said cavity, said female mold part having a pillar projection extending diametrically from the center of the wall of said cavity toward the open end of said cavity; a male mold part extending across and closing off the open end of said cavity, said male mold part having a generally hemispherical forming projection extending into said cavity, said forming projection having a central opening for receiving said pillar projection, said forming projection having surface portions opposed to the wall of said cavity and defining therewith a hollow generally hemispherical mold recess shaped to define a plurality of cutouts and covering portions formed alternately in the side surface of said mold recess, said forming projection also having means to form an engaging tube on the inner surface of one of said covering portions and projecting toward the open end of said cavity, said forming projection also having means to form an engaging post on the inner surface of a different one of said covering portions which post is shaped to fit into the engaging tube of another like subassembly, said forming projection also having means for forming a plurality of contact pieces which are integral with said engaging tube and said post respectively and which extend toward the center with their adjacent ends being spaced from each other, said pillar projection and said central opening of said projecting portion defining a space for forming a connecting piece connecting the inner end edges of said contact pieces with one another.
Claim 2
Independent Claim
290 words
An apparatus for manufacturing one subassembly which can be joined to another subassembly of the same structure to form a spherical distillation column packing, comprising: a female mold part having a hemispherical cavity and an inlet port for feeding moldable material into said cavity, said female mold part having a pillar projection extending diametrically from the center of the wall of said cavity toward the open end of said cavity; a male mold part extending across and closing off the open end of said cavity, said male mold part having a generally hemispherical forming projection extending into said cavity, said forming projection having a central opening for receiving said pillar projection, said forming projection having surface portions opposed to the wall of said cavity and defining therewith a hollow generally hemispherical mold recess shaped to define a plurality of cutouts and covering portions formed alternately in the side surface of said mold recess, said forming projection also having means to form an engaging tube on the inner surface of one of said covering portions and projecting toward the open end of said cavity, said forming projection also having means to form an engaging post on the inner surface of a different one of said covering portions which post is shaped to fit into the engaging tube of another like subassembly, said forming projection also having means for forming a plurality of contact pieces which are integral with said engaging tube and said post respectively and which extend toward the center with their adjacent ends being spaced from each other, said pillar projection and said central opening of said projecting portion defining a space for forming a connecting piece connecting the inner end edges of said contact pieces with one another.
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) | 1982-07-02 | 1983-01-01 | 1983-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-02 | 1987-01-01 | 1987-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-02 | 1991-01-01 | 1991-07-03 | $7700.00 | Window Closed / Lapsed |