Patent US3712780A successfully refreshed from Google Patents.
US3712780A
Expired / Lapsed
US
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Improved molding apparatus for simultaneously forming plural articles
Assignee: Monsanto Co
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Filing: 1969-09-25
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Granted: 1973-01-23
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Expires: 1989-09-25
Abstract
Abstract An improved mold assembly for simultaneous thermoforming of plural articles from sheet material, wherein mold and/or cutting components are individually replaceable without dismantling major portions of the assembly. The individual molds are secured in the assembly through the article forming surfaces of the mold cavities, with the means for securing the molds, such as screws, having end faces which serve as portions of the forming surfaces of the molds. Depressions in these end faces form stacking lugs in the molded articles.
Inventors
- 👤 B Jope
- 👤 A Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:56
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/26; B29C51/30; B26; B26F; B26F1/00; B26F1/38; B26F1/40; B26F1/44; B29C33/00; B29C33/30; B29C33/305; B26F2001/4427; Y; Y10; Y10S; Y10S425/00; Y10S425/812
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
109 words
An improved thermoforming mold assembly comprising: a. a support plate; b. a plurality of molds, said molds having a series of channels formed therein opening at one end into forming cavities in the molds and at the other end to the support plate; and c. means insertable through the channels in the molds for rigidly securing the molds to the support plate, said means having end faces adapted to become portions of the surfaces of the forming cavities of the molds when the molds are rigidly secured against the support plate, said end faces having shaped depressions formed therein for defining stacking lugs in articles formed in said molds.
Claim 2
Dependent Claim
109 words
An improved thermoforming mold assembly comprising: a. a support plate; b. a plurality of molds, said molds having a series of channels formed therein opening at one end into forming cavities in the molds and at the other end to the support plate; and c. means insertable through the channels in the molds for rigidly securing the molds to the support plate, said means having end faces adapted to become portions of the surfaces of the forming cavities of the molds when the molds are rigidly secured against the support plate, said end faces having shaped depressions formed therein for defining stacking lugs in articles formed in said molds.
Claim 3
Dependent Claim
28 words
The assembly of claim 1 wherein the depth of the depressions in a direction perpendicular to the surface of the forming cavities is between 0.05 to 0.150 inch.
Claim 4
Dependent Claim
143 words
An improved, trim in place, thermoforming mold assembly comprising: a. a support plate; b. a plurality of molds having a series of channels formed therein opening at one end into forming cavities in the molds and at the other end to the support plate; c. a plurality of sealing and severing blades, surrounding said molds; d. means for associating said blades with said molds to prevent vertical movement of the blades with respect to the molds; and e. means insertable through the channels in the molds for rigidly securing the molds to the support plate, said securing means having end faces adapted to become portions of the surfaces of the forming cavities of the molds when the molds are rigidly secured against the support plate, said end faces having shaped depressions formed therein for defining stacking lugs in articles formed in said molds.
Claim 5
Dependent Claim
143 words
An improved, trim in place, thermoforming mold assembly comprising: a. a support plate; b. a plurality of molds having a series of channels formed therein opening at one end into forming cavities in the molds and at the other end to the support plate; c. a plurality of sealing and severing blades, surrounding said molds; d. means for associating said blades with said molds to prevent vertical movement of the blades with respect to the molds; and e. means insertable through the channels in the molds for rigidly securing the molds to the support plate, said securing means having end faces adapted to become portions of the surfaces of the forming cavities of the molds when the molds are rigidly secured against the support plate, said end faces having shaped depressions formed therein for defining stacking lugs in articles formed in said molds.
Claim 6
Dependent Claim
33 words
The assembly of claim 3 wherein the means for associating each blade with a mold comprises a depression in the mold and a boss on the blade for snugly seating in the depression.
Claim 7
Dependent Claim
52 words
The assembly of claim 3 wherein the means for rigidly securing the molds to the support plate includes a series Of threaded channels in the support plate alignable with the channels in the molds and fasteners having threaded end portions for cooperating with the threads in the channels in the support plate.
Claim 8
Dependent Claim
32 words
The assembly of claim 3 wherein the means for associating each blade with a mold comprises a plurality of threaded fasteners extending through the thickness of the blades and into the molds.
Claim 9
Dependent Claim
59 words
The assembly of claim 5 including annular discs rigidly positioned about the peripheries of the fasteners between the ends thereof for cooperating with surfaces of the molds adjacent the support plate, whereby the mold may be pried away from the support plate while resting on the discs as the fasteners are removed from the channels in the support plate.
Claim 10
Dependent Claim
44 words
The assembly of claim 5 wherein the fasteners have vent passages formed therein extending from the surfaces of the depressions to the exterior of the molds for egress of air there through from the depressions as the stacking lugs are formed in the depressions.
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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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |