US4613474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Procedure and relevant mechanical apparatus to obtain the folding section of a plastic drinking straw
Assignee: Individual
•
Filing: 1985-01-08
•
Granted: 1986-09-23
•
Expires: 2005-01-08
Abstract
Abstract Method and apparatus for grooving a plastic drinking straw in which a straw is moved to an axially movable, rotatable, circumferentially grooved, pointed mandrel or pin then opposed grooved bars mating with grooves of the pin are pressed against the straw and moved in opposite directions lengthwise of the grooves of the bars.
Inventors
- 👤 Gino Donati
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:25
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/02; B29C59/021; B29C53/00; B29C53/22; B29C53/30; B29C67/00; B29C67/0003; B31; B31D; B31D5/00; B31D5/0095; B31F; B31F1/00; B31F1/20; B31F1/205
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
122 words
A method for forming the folding section of a plastic drinking straw comprising, supporting a plastic straw on a grooved support plate, inserting a freely rotatable piston pin having parallel circular grooves and a point for centering the straw into the plastic straw, lengthwise moving opposed forming bars having lengthwise grooves in facing surfaces, said facing surfaces being complementary to the grooves of the piston pin, and moving the bars orthogonal to the piston pin and in opposite directions at least once while said bars are in contact with a straw positioned on said piston pin thereby causing free rotation of the piston pin and formation of the folding section, retracting the forming bars, and removing the straw from the piston pin.
Claim 2
Independent Claim
122 words
A method for forming the folding section of a plastic drinking straw comprising, supporting a plastic straw on a grooved support plate, inserting a freely rotatable piston pin having parallel circular grooves and a point for centering the straw into the plastic straw, lengthwise moving opposed forming bars having lengthwise grooves in facing surfaces, said facing surfaces being complementary to the grooves of the piston pin, and moving the bars orthogonal to the piston pin and in opposite directions at least once while said bars are in contact with a straw positioned on said piston pin thereby causing free rotation of the piston pin and formation of the folding section, retracting the forming bars, and removing the straw from the piston pin.
Claim 3
Dependent Claim
11 words
The method of claim 1 wherein the piston pin rotates freely.
Claim 4
Dependent Claim
75 words
Apparatus for grooving a drinking straw, comprising: a grooved support plate for holding a straw; a circumferentially grooved, axially movable, freely rotatable, piston pin; two forming bars movable into contact with a straw mounted on said pin, said bars having longitudinally grooved facing surfaces complementary with grooves of said pin, said bars being movable lengthwise while said grooved surfaces are in contact with a straw mounted about the pin to form grooves in the straw.
Claim 5
Dependent Claim
75 words
Apparatus for grooving a drinking straw, comprising: a grooved support plate for holding a straw; a circumferentially grooved, axially movable, freely rotatable, piston pin; two forming bars movable into contact with a straw mounted on said pin, said bars having longitudinally grooved facing surfaces complementary with grooves of said pin, said bars being movable lengthwise while said grooved surfaces are in contact with a straw mounted about the pin to form grooves in the straw.
Claim 6
Dependent Claim
31 words
The device of claim 3 wherein the piston pin has formed therein a point for piloting the insertion of the piston pin into a plastic drinking straw and circumferential circular grooves.
Claim 7
Dependent Claim
45 words
The device of claim 4 wherein the forming bars are movable into a parallel relationship in contact on opposite sides of the plastic straw and thereafter advanced in directions orthogonal to the long axis of the piston pins and in opposite directions to one another.
Claim 8
Dependent Claim
20 words
The device of claim 5, wherein the only direction of translation for the piston pin in along its long axis.
Claim 9
Dependent Claim
33 words
The device of claim 6 wherein the forming bars are movable into contact with the straw on the piston pin, and away from the straw on the piston pin in a linear fashion.
Claim 10
Dependent Claim
35 words
The device of claim 7 wherein the forming bars are movable in opposite directions, orthogonally to the workpiece in a reciprocating fashion, thereby forming the folding section by rotating the piston pin in opposite directions.
References Cited (Backward Citations)
US1455433A
Cited
US2631645A
Cited
US3021245A
Cited
US2985077A
Cited
US3012604A
Cited
US3242828A
Cited
US3339004A
Cited
US3751541A
Cited
US3949045A
Cited
US4088226A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-22 | 1990-03-24 | 1990-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-22 | 1994-03-24 | 1994-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-22 | 1998-03-24 | 1998-09-23 | $7700.00 | Window Closed / Lapsed |