US3924987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Articulated mold opening and closing means for use in blow molding apparatus
Assignee: Individual
•
Filing: 1973-11-30
•
Granted: 1975-12-09
•
Expires: 1993-11-30
Abstract
Abstract An open-and-shut mold for use in blow molding machines wherein the mold sections or their platens are articulately connected to plate-like closing members which are movable toward and away from each other to thereby close or open the mold. The articulate connections include rams which are rigid with the central portions of the mold sections or with the corresponding portions of the platens and are secured to the respective closing members by means of horizontal pivots or universal joints. The mold sections are guided by two tie rods which are located at a level below the mold sections and are spaced apart so that the distance between the tie rods exceeds the width of the mold sections. Helical springs, dished springs or other suitable biasing means are provided between the closing members and the respective platens or mold sections to maintain the open sides of the mold sections in parallelism with each other as soon as the mold begins to open even if the closing members are tilted or tilted and distorted during the application of sealing and clamping forces.
Inventors
- 👤 Gottfried Mehnert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:34
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/56; B29C33/00; B29C33/20; B29C33/26; B29C49/48; B29C2049/4856; B29C2049/4862
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
159 words
An open-and-shut mold, particularly for use in blow-molding machines, comprising two upright closing members each having an upper portion, a lower portion, and an opening; substantially horizontally oriented parallel tie rods extending between said lower portions, at least one of said lower portions being movable together with and lengthwise of said tie rods; two mold sections having open sides facing each other; means articulately connecting each of said mold sections to said upper portion of one of said closing members in vertically spaced relationship to said tie rods, including elements rigid with said mold sections and extending with clearance through the openings of the respective closing members, and pivots articulately connecting said elements to the respective closing members; and means for moving at least one of said closing members to thereby shift the respective mold sections in said vertically spaced relationship between first and second positions in which said open sides respectively abut and are spaced from one another.
Claim 2
Dependent Claim
159 words
An open-and-shut mold, particularly for use in blow-molding machines, comprising two upright closing members each having an upper portion, a lower portion, and an opening; substantially horizontally oriented parallel tie rods extending between said lower portions, at least one of said lower portions being movable together with and lengthwise of said tie rods; two mold sections having open sides facing each other; means articulately connecting each of said mold sections to said upper portion of one of said closing members in vertically spaced relationship to said tie rods, including elements rigid with said mold sections and extending with clearance through the openings of the respective closing members, and pivots articulately connecting said elements to the respective closing members; and means for moving at least one of said closing members to thereby shift the respective mold sections in said vertically spaced relationship between first and second positions in which said open sides respectively abut and are spaced from one another.
Claim 3
Dependent Claim
45 words
An open-and-shut mold as defined in claim 1, wherein said tie rods include a first and a second tie rod, said first and second tie rods being spaced apart from each other and said mold sections being disposed in the space between said tie rods.
Claim 4
Dependent Claim
43 words
An open-and-shut mold as defined in claim 1, further comprising a pair of platens, each of said platens being located between one of said mold sections and the respective closing member and each of said platens being rigid with the adjacent mold section.
Claim 5
Dependent Claim
22 words
An open-and-shut mold as defined in claim 1, wherein the axes of said tie rods are located in a common horizontal plane.
Claim 6
Dependent Claim
24 words
An open-and-shut mold as defined in claim 1, further comprising biasing means interposed between each of said closing members and the respective mold section.
Claim 7
Dependent Claim
25 words
An open-and-shut mold as defined in claim 1, wherein said pivots comprise pivot members whose axes are normal to the axes of said tie rods.
Claim 8
Dependent Claim
25 words
An open-and-shut mold as defined in claim 1, wherein said lower end portions are enlarged and said tie rods extend through said lower end portions.
Claim 9
Dependent Claim
57 words
An open-and-shut mold as defined in claim 1, wherein one of said closing members is rigid with said tie rods and the other closing member is slidable along said tie rods, said means for moving comprising means for reciprocating said tie rods and means for simultaneosly reciprocating said other closing member with respect to said tie rods.
Claim 10
Dependent Claim
16 words
An open-and-shut mold as defined in claim 8, wherein said means for reciprocating comprise fluid-operated motors.
Claim 11
Dependent Claim
20 words
An open-and-shut mold as defined in claim 1, wherein said tie rods are each located in a different horizontal plane.
Claim 12
Dependent Claim
159 words
An open-and-shut mold, particularly for use in blow-molding machines, comprising two upright closing members each having an upper portion, a lower portion, and an opening; substantially horizontally oriented parallel tie rods extending between said lower portions, at least one of said lower portions being movable together with and lengthwise of said tie rods; two mold sections having open sides facing each other; means articulately connecting each of said mold sections to said upper portion of one of said closing members in vertically spaced relationship to said tie rods, including rams rigid with said mold sections and extending with clearance through the openings of the respective closing members, and pivots articulately connecting said rams to the respective closing members; and means for moving at least one of said closing members to thereby shift the respective mold sections in said vertically spaced relationship between first and second positions in which said open sides respectively abut and are spaced from one another.
Claim 13
Dependent Claim
159 words
An open-and-shut mold, particularly for use in blow-molding machines, comprising two upright closing members each having an upper portion, a lower portion, and an opening; substantially horizontally oriented parallel tie rods extending between said lower portions, at least one of said lower portions being movable together with and lengthwise of said tie rods; two mold sections having open sides facing each other; means articulately connecting each of said mold sections to said upper portion of one of said closing members in vertically spaced relationship to said tie rods, including rams rigid with said mold sections and extending with clearance through the openings of the respective closing members, and pivots articulately connecting said rams to the respective closing members; and means for moving at least one of said closing members to thereby shift the respective mold sections in said vertically spaced relationship between first and second positions in which said open sides respectively abut and are spaced from one another.
Claim 14
Dependent Claim
53 words
An open-and-shut mold as defined in claim 11, wherein each of said closing members has a side which faces towards and another side which faces away from the respective mold section, eaCh of said closing members having a support at said other side, and said pivots connecting said rams to the respective supports.
Claim 15
Dependent Claim
165 words
An open-and-shut mold, particularly for use in blow-molding machines, comprising two upright closing members each having an upper portion and a lower portion; substantially horizontally oriented parallel tie rods extending between said lower portions, at least one of said lower portions being movable together with and lengthwise of said tie rods; two mold sections having open sides facing one another; means articulately connecting each of said mold sections to said upper portion of one of said closing members in vertically spaced relationship to said tie rods, comprising a pivot member mounted on each of said closing members and articulately supporting the respective mold section; biasing means interposed between said mold sections and the respective closing members below and vertically spaced from said pivot member; and means for moving at least one of said closing members to thereby shift the respective mold sections in said vertically spaced relationship between first and second positions in which said open sides respectively abut and are spaced from one another.
Claim 16
Dependent Claim
165 words
An open-and-shut mold, particularly for use in blow-molding machines, comprising two upright closing members each having an upper portion and a lower portion; substantially horizontally oriented parallel tie rods extending between said lower portions, at least one of said lower portions being movable together with and lengthwise of said tie rods; two mold sections having open sides facing one another; means articulately connecting each of said mold sections to said upper portion of one of said closing members in vertically spaced relationship to said tie rods, comprising a pivot member mounted on each of said closing members and articulately supporting the respective mold section; biasing means interposed between said mold sections and the respective closing members below and vertically spaced from said pivot member; and means for moving at least one of said closing members to thereby shift the respective mold sections in said vertically spaced relationship between first and second positions in which said open sides respectively abut and are spaced from one another.
Claim 17
Dependent Claim
31 words
An open-and-shut mold as defined in claim 13, further comprising additional biasing means interposed between said closing members and the respective mold sections in vertically spaced relationship above said pivot members.
Claim 18
Dependent Claim
181 words
An open-and-shut mold, particularly for use in blow-molding machines, comprising two upright closing members each having an upper portion and a lower portion; substantially horizontally oriented parallel tie rods extending between said lower portions, at least one of said lower portions being movable together with and lengthwise of said tie rods; two mold sections having open sides facing one another; means articulately connecting each of said mold sections to said upper portion of one of said closing members in vertically spaced relationship to said tie rods, comprising a pivot member mounted on each of said closing members and articulately supporting the respective mold section; biasing means below and vertically spaced from the respective pivot member for biasing the respective mold section so as to maintain said open sides in parallelism with one another when said open sides are spaced apart; and means for moving at least one of said closing members to thereby shift the respective mold sections in said vertically spaced relationship between first and second positions in which said open sides respectively abut and are spaced from one another.
Claim 19
Dependent Claim
181 words
An open-and-shut mold, particularly for use in blow-molding machines, comprising two upright closing members each having an upper portion and a lower portion; substantially horizontally oriented parallel tie rods extending between said lower portions, at least one of said lower portions being movable together with and lengthwise of said tie rods; two mold sections having open sides facing one another; means articulately connecting each of said mold sections to said upper portion of one of said closing members in vertically spaced relationship to said tie rods, comprising a pivot member mounted on each of said closing members and articulately supporting the respective mold section; biasing means below and vertically spaced from the respective pivot member for biasing the respective mold section so as to maintain said open sides in parallelism with one another when said open sides are spaced apart; and means for moving at least one of said closing members to thereby shift the respective mold sections in said vertically spaced relationship between first and second positions in which said open sides respectively abut and are spaced from one another.
References Cited (Backward Citations)
US3277534A
Cited
US3334380A
Cited
US3449481A
Cited
US3402431A
Cited
US3776680A
Cited
US3734671A
Cited
US3782879A
Cited
US3785761A
Cited
US3807929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |