Patent US3887321A successfully refreshed from Google Patents.
US3887321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum sealed molding apparatus
Assignee: Sintokogio Ltd
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Filing: 1974-04-30
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Granted: 1975-06-03
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Expires: 1994-04-30
Abstract
Abstract A vacuum sealed molding process and apparatus in which a covering sheet of synthetic resin is applied on a pattern fixed on a pattern plate at a first station, and this pattern plate is then transferred to a second station at which the pattern is removed after molding.
Inventors
- 👤 Itsuo Hijikata
- 👤 Masayoshi Kasazaki
- 👤 Hideto Terada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:59
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/02; B22C9/03; B29; B29C; B29C51/00; B29C51/10; Y; Y10; Y10S; Y10S425/00; Y10S425/012; Y10S425/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
310 words
A vacuum sealed molding apparatus comprising means for transferring a pattern fixed on a pattern plate from a first position to a second position and then from said second position to said first position, said second position being apart from the first position and provided with means for supplying a charge of heat resisting particulate material into a flask which is conveyed to said second position; covering sheet supplying means disposed at a third position apart from said first and second positions for holding a web of a covering sheet of synthetic resin in a roll form; a frame member movable from said first position to said third position and then from said third position to said first position and consisted of surrounding side walls forming an open end thereof and a vacuum chamber provided along the side walls having a slot to draw said covering sheet to said slot by vacuum suction, said frame member being operative to hold said covering sheet on the surface of said open end by said vacuum suction when it is moved to said third position and to pull out said sheet from said supplying means when being moved to said first position whereby said pulled out sheet is supplied at the third position so that said frame member moved again to the third position is adapted to hold said sheet; means for causing vertical movement of said frame member holding said sheet or said pattern transferred to said first position relatively toward each other so as to apply said covering sheet on the surfaces of the pattern and the pattern plate and means disposed at the second position for causing vertical movemEnt of said flask or said pattern relatively so as to set the flask on the pattern covered with the covering sheet and then remove said pattern from the flask after molding.
Claim 2
Dependent Claim
310 words
A vacuum sealed molding apparatus comprising means for transferring a pattern fixed on a pattern plate from a first position to a second position and then from said second position to said first position, said second position being apart from the first position and provided with means for supplying a charge of heat resisting particulate material into a flask which is conveyed to said second position; covering sheet supplying means disposed at a third position apart from said first and second positions for holding a web of a covering sheet of synthetic resin in a roll form; a frame member movable from said first position to said third position and then from said third position to said first position and consisted of surrounding side walls forming an open end thereof and a vacuum chamber provided along the side walls having a slot to draw said covering sheet to said slot by vacuum suction, said frame member being operative to hold said covering sheet on the surface of said open end by said vacuum suction when it is moved to said third position and to pull out said sheet from said supplying means when being moved to said first position whereby said pulled out sheet is supplied at the third position so that said frame member moved again to the third position is adapted to hold said sheet; means for causing vertical movement of said frame member holding said sheet or said pattern transferred to said first position relatively toward each other so as to apply said covering sheet on the surfaces of the pattern and the pattern plate and means disposed at the second position for causing vertical movemEnt of said flask or said pattern relatively so as to set the flask on the pattern covered with the covering sheet and then remove said pattern from the flask after molding.
Claim 3
Dependent Claim
310 words
A vacuum sealed molding apparatus comprising means for transferring a pattern fixed on a pattern plate from a first position to a second position and then from said second position to said first position, said second position being apart from the first position and provided with means for supplying a charge of heat resisting particulate material into a flask which is conveyed to said second position; covering sheet supplying means disposed at a third position apart from said first and second positions for holding a web of a covering sheet of synthetic resin in a roll form; a frame member movable from said first position to said third position and then from said third position to said first position and consisted of surrounding side walls forming an open end thereof and a vacuum chamber provided along the side walls having a slot to draw said covering sheet to said slot by vacuum suction, said frame member being operative to hold said covering sheet on the surface of said open end by said vacuum suction when it is moved to said third position and to pull out said sheet from said supplying means when being moved to said first position whereby said pulled out sheet is supplied at the third position so that said frame member moved again to the third position is adapted to hold said sheet; means for causing vertical movement of said frame member holding said sheet or said pattern transferred to said first position relatively toward each other so as to apply said covering sheet on the surfaces of the pattern and the pattern plate and means disposed at the second position for causing vertical movemEnt of said flask or said pattern relatively so as to set the flask on the pattern covered with the covering sheet and then remove said pattern from the flask after molding.
Claim 4
Dependent Claim
310 words
A vacuum sealed molding apparatus comprising means for transferring a pattern fixed on a pattern plate from a first position to a second position and then from said second position to said first position, said second position being apart from the first position and provided with means for supplying a charge of heat resisting particulate material into a flask which is conveyed to said second position; covering sheet supplying means disposed at a third position apart from said first and second positions for holding a web of a covering sheet of synthetic resin in a roll form; a frame member movable from said first position to said third position and then from said third position to said first position and consisted of surrounding side walls forming an open end thereof and a vacuum chamber provided along the side walls having a slot to draw said covering sheet to said slot by vacuum suction, said frame member being operative to hold said covering sheet on the surface of said open end by said vacuum suction when it is moved to said third position and to pull out said sheet from said supplying means when being moved to said first position whereby said pulled out sheet is supplied at the third position so that said frame member moved again to the third position is adapted to hold said sheet; means for causing vertical movement of said frame member holding said sheet or said pattern transferred to said first position relatively toward each other so as to apply said covering sheet on the surfaces of the pattern and the pattern plate and means disposed at the second position for causing vertical movemEnt of said flask or said pattern relatively so as to set the flask on the pattern covered with the covering sheet and then remove said pattern from the flask after molding.
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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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |