Patent US3796532A successfully refreshed from Google Patents.
US3796532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for contour molding of extruded material
Assignee: Individual
•
Filing: 1972-07-26
•
Granted: 1974-03-12
•
Expires: 1992-07-26
Abstract
Abstract An extruding head for progressively contouring to shape the external surface of a continuously moving column of extruded plasticized material within the limit of its initial diameter. To this end the head includes one or more rapidly rotating shaping elements which fly about and engage the extrusion as it exits from an extrusion chamber and operate to smoothly shape the extrusion to its desired contour. Means are provided to variably adjust the spacing between the extrusion-engaging tip of each shaping element and its axis of rotation so that as the extrusion progresses past said element the diameter of the extrusion may be progressively reduced, increased or held to any diameter determined by said spacing. The extrusion head also provides for the use of a single extrusion-engaging element which spins about the continuously discharging extrusion to helically thread or groove its surface. Also provided are means for heating or cooling the extrusion as it moves through the extrusion chamber and for applying a coloring medium to the extrusion to be worked into and about the surface thereof by the aforesaid shaping element.
Inventors
- 👤 M Needleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:43
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/50; B29C48/00; B29C48/001; B29C48/002; B29C48/03; B29C48/06; B29C48/13; B29C48/16; B29C48/17; B29C48/25; B29C48/30; B29C48/301
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
137 words
An extruding head for shaping the external contour of a continuously moving extrusion of plasticized material comprising, in combination, a central stationary extrusion-forming chamber from one end of which the extrusion is rectilinearly continuously discharged, and means operative to revolve about the longitudinal axis of the extrusion chamber and engageable with the extrusion at a location closely adjacent its point of discharge from the extrusion chamber to circumferentially mold the extrusion to shape at said location, said molding means including a plurality of arms circumferentially spaced about and pivotally mounted upon a support therefor rotatable about said extrusion chamber, said arms being respectively adapted for pivotal movement in planes extending parallel to and radially of the longitudinal axis of the extrusion, the outer end of each said arm having operatively associated therewith an extrusion shaping element. 4
Claim 2
Dependent Claim
137 words
An extruding head for shaping the external contour of a continuously moving extrusion of plasticized material comprising, in combination, a central stationary extrusion-forming chamber from one end of which the extrusion is rectilinearly continuously discharged, and means operative to revolve about the longitudinal axis of the extrusion chamber and engageable with the extrusion at a location closely adjacent its point of discharge from the extrusion chamber to circumferentially mold the extrusion to shape at said location, said molding means including a plurality of arms circumferentially spaced about and pivotally mounted upon a support therefor rotatable about said extrusion chamber, said arms being respectively adapted for pivotal movement in planes extending parallel to and radially of the longitudinal axis of the extrusion, the outer end of each said arm having operatively associated therewith an extrusion shaping element. 4
Claim 3
Dependent Claim
46 words
An extrusion head as defined in claim 1 wherein is provided means engageable with the inner ends of said arms to adjustably radially shift the latter toward and away from one another to thereby correspondingly adjust the spacing between said ends of the extrusion shaping elements.
Claim 4
Dependent Claim
39 words
An extrusion head as defined in claim 2 wherein said arm adjusting means consists of a member which is axially shiftable on said rotatable support for said pivoted arms and engages the latter to vary the radial spread thereof.
Claim 5
Dependent Claim
26 words
An extrusion head as defined in claim 2 including means for locking said pivoted arms in their radially adjusted positions relative to said arm shifting means.
Claim 6
Dependent Claim
34 words
An extrusion head as defined in claim 1 wherein said extrusion shaping elements extend lengthwise of the extrusion chamber and terminate in inwardly turned portions closely overhanging the discharge end of the extrusion chamber.
Claim 7
Dependent Claim
35 words
An extrusion head as defined in claim 1 wherein said extrusion shaping elements are respectively rectilinearly shiftable toward and away from one another along a line perpendicular to and intersecting the axis of the extrusion.
Claim 8
Dependent Claim
30 words
An extrusion head as defined in claim 6 wherein means is provided for translating said radial movement of said pivoted arms into said rectilinear movement of said extrusion shaping elements.
Claim 9
Independent Claim
179 words
An apparatus for molding an extrusion of plasticized material to a cylindrical shape of the same or progressively different diameter along the length thereof comprising, in combination, a central hollow member constituting an extrusion chamber from which the plasticized material is extruded in the form of a modable column of a predeterminedly established cross-sectional area, an annular assembly surrounding said central member, said assembly including a cylinder journalled for rotation about said extrusion chamber and a cam ring encircling said cylinder, said cam ring being axially shiftable and rotatable with said cylinder, and means operatively connected to said cylinder adjacent its extrusion-discharging end and rotatable therewith for shaping the extrusion as it exits from the extrusion chamber, said extrusion-shaping means including at least one element having a free end adapted to be shifted radially toward and away from the longitudinal axis of the extrusion to mold the same to a diameter determined by the radial distance of said end from said axis, said extrusion-shaping means being engageable by said axially shiftable cam ring to selectively vary said radial distance.
Claim 10
Independent Claim
179 words
An apparatus for molding an extrusion of plasticized material to a cylindrical shape of the same or progressively different diameter along the length thereof comprising, in combination, a central hollow member constituting an extrusion chamber from which the plasticized material is extruded in the form of a modable column of a predeterminedly established cross-sectional area, an annular assembly surrounding said central member, said assembly including a cylinder journalled for rotation about said extrusion chamber and a cam ring encircling said cylinder, said cam ring being axially shiftable and rotatable with said cylinder, and means operatively connected to said cylinder adjacent its extrusion-discharging end and rotatable therewith for shaping the extrusion as it exits from the extrusion chamber, said extrusion-shaping means including at least one element having a free end adapted to be shifted radially toward and away from the longitudinal axis of the extrusion to mold the same to a diameter determined by the radial distance of said end from said axis, said extrusion-shaping means being engageable by said axially shiftable cam ring to selectively vary said radial distance.
Claim 11
Dependent Claim
61 words
An apparatus as defined in claim 8 wherein said extrusion-shaping means includes a plurality of said free-ended elements spaced circumferentially about said longitudinal axis, said plurality of rotating elements being commonly engageable by said cam ring to simultaneously and uniformly vary the positions of said shaping ends relatively to the extrusion and thereby conjointly describe a shaping orifice of predetermined diameter.
Claim 12
Dependent Claim
50 words
An apparatus as defined in claim 8 wherein said extrusion-shaping means includes a pair of said free-ended elements disposed in diametrically opposed relation with respect to the extrusion whereby upon rotation thereof about said extrusion they conjointly describe a circle defining the shaped cross-sectional size of the extrusion passing therebetween.
Claim 13
Dependent Claim
24 words
An apparatus as defined in claim 8 including means for effecting high speed rotation of said assembly and its operatively connected extrusion shaping means.
Claim 14
Dependent Claim
26 words
An apparatus as defined in claim 8 for effecting axial shifting of said cam ring simultaneously as the same rotates about the axis of the extrusion.
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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |