US3765811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for manufacturing standard-length articles covered with plastic material
Assignee: DIC Corp
•
Filing: 1972-01-03
•
Granted: 1973-10-16
•
Expires: 1992-01-03
Abstract
Abstract An apparatus for manufacturing standard-short-length articles covered with a plastic material comprises means for automatically and successively supplying standard-short-length cores one by one therefrom, means for receiving said cores and moving them in longitudinally aligned relationships into a cross head die of an extruder where said cores are continuously covered with the plastic material and are made in the form of a long continuum, a take-off equipment for drawing said continuum at a predetermined speed, and means for cutting said continuum, after passed through said take-off equipment, at portions between adjacent ends of the successive cores. In order to enable the continuum to be cut in the desired portions, the core moving means and the cutting means as well as the take-off equipment are adapted to operate at the same speed.
Inventors
- 👤 T Sawada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:28
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/15; B29C48/03; B29C48/09
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
170 words
An apparatus for manufacturing standard-short-length articles covered with a plastic material with an extruder, comprising means for automatically and successively supplying standardshort-length individual cores one by one therefrom around which the plastic materiAl is to be extruded, means for receiving said cores and moving forward them at a predetermined speed and in longitudinally aligned relationships into a cross head die of the extruder where said cores are successively covered with the plastic material and are made in the form of a long continuum consisting of a train of longitudinally aligned cores and a plastic wall extruded therearound, said core moving means moving back to initial position after a predetermined forward travel, a take-off equipment drawing said continuum in a forward direction substantially at the same speed as that of said core moving means in the forward direction, and means for cutting said continuum at portions between the adjacent ends of the successive cores, said cutting means movable forward and backward at the same speed that of said core moving means.
Claim 2
Independent Claim
170 words
An apparatus for manufacturing standard-short-length articles covered with a plastic material with an extruder, comprising means for automatically and successively supplying standardshort-length individual cores one by one therefrom around which the plastic materiAl is to be extruded, means for receiving said cores and moving forward them at a predetermined speed and in longitudinally aligned relationships into a cross head die of the extruder where said cores are successively covered with the plastic material and are made in the form of a long continuum consisting of a train of longitudinally aligned cores and a plastic wall extruded therearound, said core moving means moving back to initial position after a predetermined forward travel, a take-off equipment drawing said continuum in a forward direction substantially at the same speed as that of said core moving means in the forward direction, and means for cutting said continuum at portions between the adjacent ends of the successive cores, said cutting means movable forward and backward at the same speed that of said core moving means.
Claim 3
Dependent Claim
23 words
An apparatus of claim 1, wherein said cutting means is firmly carried on a truck to assist said cutting means in its moving.
Claim 4
Dependent Claim
35 words
An apparatus of claim 2, wherein said core moving means is connected with said truck by a connecting means so that said core moving means and said cutting means are moved at the same speed.
Claim 5
Dependent Claim
19 words
An apparatus of claim 3, wherein a position of said cutting means is adjustable relative to said connecting means.
Claim 6
Dependent Claim
44 words
An apparatus of claim 3, wherein said connecting means is partially formed with teeth engageable with an index gear driven in the forward direction by a driving means for said take-off equipment, whereby said predetermined forward travel of said core moving means is caused.
Claim 7
Dependent Claim
157 words
An apparatus of claim 3, comprising an operating dog provided at a portion of said connecting means, a first limit switch disposed on a path of said dog, a second limit switch disposed at a position corresponding to the end of the forward stroke of said dog, said limit switches being operated by said dog, and a chuck means movable with said cutting means for firmly holding said continuum when said first limit switch is closed by the forward movement of said dog and releasing said continuum when said second limit switch is closed by said dog, said cutting means including a cutting member movable toward and substantially perpendicular to the axis of said continuum when said first limit switch is closed and away from the axis of said continuum when said second limit switch is closed, said connecting being moved back by a length corresponding to its forward travel when said second limit switch is closed.
Claim 8
Dependent Claim
45 words
An apparatus of claim 6, the operation of said chuck means, the movement of said cutting member toward and away from the axis of said continuum, and the reversal of said connecting means are effected by separate fluid operated cylinders cooperated with said limit switches.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |