US3854859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaping head for plastic molding machines
Assignee: Individual
•
Filing: 1972-10-19
•
Granted: 1974-12-17
•
Expires: 1992-10-19
Abstract
Abstract A shaping head for machines for extrusion-molding plastic articles. The head has an inner channel of rectangular section and substantially flat faced walls, one of which is defined by a plurality of sectionalized plates adapted to enter into a passage and movable between raised and lowered positions, so that said passage may be totally or partially closed. With this head a sheet of plastic material can be manufactured, with a number of ribs, which will be equally spaced or not, having the same or different heights, at will, and even including intermediate flat sections covering various sections of the sheet. Besides, weakening channels may be included to facilitate the plying of the sheet.
Inventors
- 👤 M Sola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:31
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/305; B29C48/31; B29C48/03; B29C48/07; B29C48/08; B29C48/12; B29C48/255; B29C48/2556
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
140 words
In a shaping head for extrusion molding plastic articles an inner channel having a rectangular section and substantially flat faced walls, a number of longitudinally oriented, spaced slots through at least one of the faces of said inner channel, a plate of a width to sealingly fit the slot being arranged in each one of said slots, said plate being adapted to be displaced between a first position in which the slot has its maximum height to a second position in which said slot is inoperative because said plate''s edge engages the opposite face of said channel, and wherein each one of said plates is comprised of several mutually independent plate sections which are engaged at their edges, and each one of said plate sections is associated with a common control that enables each unit to resiliently and separately yield.
Claim 2
Dependent Claim
140 words
In a shaping head for extrusion molding plastic articles an inner channel having a rectangular section and substantially flat faced walls, a number of longitudinally oriented, spaced slots through at least one of the faces of said inner channel, a plate of a width to sealingly fit the slot being arranged in each one of said slots, said plate being adapted to be displaced between a first position in which the slot has its maximum height to a second position in which said slot is inoperative because said plate''s edge engages the opposite face of said channel, and wherein each one of said plates is comprised of several mutually independent plate sections which are engaged at their edges, and each one of said plate sections is associated with a common control that enables each unit to resiliently and separately yield.
Claim 3
Dependent Claim
21 words
A shaping head as claimed in the above claim wherein a separate control is associated to each one of said plates.
Claim 4
Dependent Claim
17 words
A shaping head as claimed in claim 1 wherein a common control is associated with all plates.
Claim 5
Dependent Claim
38 words
A shaping head as claimed in claims 1 and 3, wherein said common control of said plates includes a mechanism which is synchronized with the machine production gear, to so displace said plates jointly or alternatively and selectively.
Claim 6
Dependent Claim
23 words
A shaping head as claimed in claim 1 wherein said common control is adapted tO independently and selectively act upon said plate sections.
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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |