US3689862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stackable coil form
Assignee: Precision Paper Tube Co
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Filing: 1971-01-20
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Granted: 1972-09-05
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Expires: 1991-01-20
Abstract
Abstract A molded plastic coil form is provided with a pair of end flanges to permit a plurality of such coil forms to be interconnected or stacked. A pin portion extends outwardly from one of the end flanges, and an opening extends inwardly through the other end flange. The pin portion and opening are sized to permit the pin of one coil form to be received by the opening of another coil form, and a plurality of coil forms can be joined by inserting the pin portion of each coil form into the opening of the adjacent coil form. One of the flanges is smaller than the other, and the other flange is recessed to non-rotatably receive the smaller flange as the coil forms are joined. At least one wire is imbedded in the recessed end flange and extends outwardly from the end flange generally perpendicularly to the tubular portion.
Inventors
- 👤 Raymond H Hilgers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:49
CPC Classifications
H; H01; H01F; H01F5/00; H01F5/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
133 words
An integrally molded plastic coil form having a pair of ends comprising a generally tubular body portion, a pair of axially spaced flanges extending from the body portion generally perpendicularly to the axis thereof, and a pin portion extending from one end of the coil form, the other end of the coil form being provided with an inwardly extending central opening, the size of the opening being slightly greater than the pin portion whereby the opening may receive the pin portion of another coil form, one of the end flanges being larger than the other end flange and said one end flange having an axially inwardly extending recess having a shape corresponding to the shape of the other end flange whereby the recess may receive the other end flange of another coil form.
Claim 2
Dependent Claim
133 words
An integrally molded plastic coil form having a pair of ends comprising a generally tubular body portion, a pair of axially spaced flanges extending from the body portion generally perpendicularly to the axis thereof, and a pin portion extending from one end of the coil form, the other end of the coil form being provided with an inwardly extending central opening, the size of the opening being slightly greater than the pin portion whereby the opening may receive the pin portion of another coil form, one of the end flanges being larger than the other end flange and said one end flange having an axially inwardly extending recess having a shape corresponding to the shape of the other end flange whereby the recess may receive the other end flange of another coil form.
Claim 3
Dependent Claim
26 words
The coil form of claim 1 in which the pin portion extends from the flange having the recess, the opening extending through the other end flange.
Claim 4
Dependent Claim
58 words
The coil form of claim 1 in which said recess is defined by a perimetric rib extending axially outwardly from said one flange, the other end flange of another coil form being receivable by the perimetric rib and the rib having a curved outer edge whereby wire wrapped about the rib tends to slip axially off the rib.
Claim 5
Dependent Claim
31 words
The coil form of claim 1 in which the recess and the other end flange are non-circular whereby the recess can non-rotatably receive the other end flange of another coil form.
Claim 6
Dependent Claim
29 words
The coil form of claim 1 in which the center of the recess and the center of the other flange are offset from the axis of the body portion.
Claim 7
Dependent Claim
105 words
An integrally molded plastic coil form having a pair of ends comprising a generally tubular body portion, a pair of axially spaced flanges extending from the body portion generally perpendicularly to the axis thereof, a wire embedded in one of the end flanges and extending generally perpendicularly to the axis of the tubular portion, and a pin portion extending from one end of the coil form, the other end of the coil form being provided with an inwardly extending central opening, the size of the opening being slightly greater than the pin portion whereby the opening may receive the pin portion of another coil form.
Claim 8
Dependent Claim
105 words
An integrally molded plastic coil form having a pair of ends comprising a generally tubular body portion, a pair of axially spaced flanges extending from the body portion generally perpendicularly to the axis thereof, a wire embedded in one of the end flanges and extending generally perpendicularly to the axis of the tubular portion, and a pin portion extending from one end of the coil form, the other end of the coil form being provided with an inwardly extending central opening, the size of the opening being slightly greater than the pin portion whereby the opening may receive the pin portion of another coil form.
Claim 9
Dependent Claim
87 words
An integrally molded plastic coil form having a pair of ends comprising an exposed generally tubular body portion and a pair of axially spaced geNerally flat end flanges extending from the body portion generally perpendicularly to the axis thereof, one of the end flanges being larger than the other end flange and said one end flange having an axially inwardly extending recess having a shape corresponding to the shape of the other end flange whereby the recess may receive the other end flange of another coil form.
Claim 10
Dependent Claim
87 words
An integrally molded plastic coil form having a pair of ends comprising an exposed generally tubular body portion and a pair of axially spaced geNerally flat end flanges extending from the body portion generally perpendicularly to the axis thereof, one of the end flanges being larger than the other end flange and said one end flange having an axially inwardly extending recess having a shape corresponding to the shape of the other end flange whereby the recess may receive the other end flange of another coil form.
Claim 11
Dependent Claim
31 words
The coil form of claim 7 in which the recess and the other end flange are non-circular whereby the recess can non-rotatably receive the other end flange of another coil form.
Claim 12
Dependent Claim
38 words
The coil form of claim 6 in which the wire includes crimped portions adjacent the points at which the wire extends from said one flange whereby relative sliding movement between the wire and said one flange is restrained.
Claim 13
Dependent Claim
151 words
An integrally molded plastic coil form comprising a generally tubular body portion, a pair of axially spaced end flanges extending perpendicularly from the body portion at opposite ends thereof, one of the end flanges being provided with an opening extending inwardly toward the other end flange, a pin portion extending outwardly from the other end flange, the size of the opening being slightly greater than the size of the pin portion whereby the opening may receive the pin portion of another coil form, one of the end flanges having a transverse extent greater than that of the other end flange and having a recess sized slightly greater than the other end flange whereby the recess may receive an end flange of another coil form, and a wire embedded in the end flange having the recess and extending outwardly from the end flange generally perpendicular to the axis of the body portion.
Claim 14
Dependent Claim
151 words
An integrally molded plastic coil form comprising a generally tubular body portion, a pair of axially spaced end flanges extending perpendicularly from the body portion at opposite ends thereof, one of the end flanges being provided with an opening extending inwardly toward the other end flange, a pin portion extending outwardly from the other end flange, the size of the opening being slightly greater than the size of the pin portion whereby the opening may receive the pin portion of another coil form, one of the end flanges having a transverse extent greater than that of the other end flange and having a recess sized slightly greater than the other end flange whereby the recess may receive an end flange of another coil form, and a wire embedded in the end flange having the recess and extending outwardly from the end flange generally perpendicular to the axis of the body portion.
Claim 15
Dependent Claim
40 words
The coil form of claim 10 in which the pin portion extends from the flange having the recess and extends generally coaxially with the body portion, the opening extending through the other end flange generally coaxially with the body portion.
Claim 16
Dependent Claim
35 words
The coilform of claim 10 in which the recess is defined by a perimetric shoulder extending axially outwardly from the flange and having a thickness substantially equal to the thickness of the other end flange.
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |