US3685820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing press folders
Assignee: Linotype and Machinery Ltd
•
Filing: 1970-04-13
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Granted: 1972-08-22
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Expires: 1990-04-13
Abstract
Abstract A flying tucker folder in which the tucker blades are carried by a shaft rotatably mounted on a folding drum which shaft is rotated by a sun and planetary gear arrangement, the sun gear being given an oscillatory motion to control the movement of the tucker blades into the nip of the folding rollers.
Inventors
- 👤 Louis M Surbrook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:47
CPC Classifications
B; B65; B65H; B65H45/00; B65H45/12; B65H45/16; B65H45/161; B65H45/28
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
199 words
A flying tucker folder mechanism for a web fed printing press having a former plate for initially folding the web in a lengthwise direction, feed in rollers for feeding the web into the folder mechanism and a cutting cylinder for severing the lengthwise folded web into sections, said folder mechanism comprising a pair folding rollers, and a folding cylinder adjacent said folding rollers, said folding cylinder including a pair of shafts rotatably mounted opposite each other near the periphery of said folding cylinder, a plurality of tucker blades secured to each shaft of the pair of shafts, a planet gear means connected to each shaft, sun gear means about which each of the planet gears rotate, and means for oscillating said sun gear means to vary the rotational movement in each rotational cycle of movement of the tucker blade shafts whereby in any one rotation of the folder drum each set of tucker blades will project from the surface of the folding drum twice, one such projection following substantially the dual curvature of the nip of the folding rollers for the purpose for pushing a severed web carried by the folding drum into the nip of the folding rollers.
Claim 2
Dependent Claim
199 words
A flying tucker folder mechanism for a web fed printing press having a former plate for initially folding the web in a lengthwise direction, feed in rollers for feeding the web into the folder mechanism and a cutting cylinder for severing the lengthwise folded web into sections, said folder mechanism comprising a pair folding rollers, and a folding cylinder adjacent said folding rollers, said folding cylinder including a pair of shafts rotatably mounted opposite each other near the periphery of said folding cylinder, a plurality of tucker blades secured to each shaft of the pair of shafts, a planet gear means connected to each shaft, sun gear means about which each of the planet gears rotate, and means for oscillating said sun gear means to vary the rotational movement in each rotational cycle of movement of the tucker blade shafts whereby in any one rotation of the folder drum each set of tucker blades will project from the surface of the folding drum twice, one such projection following substantially the dual curvature of the nip of the folding rollers for the purpose for pushing a severed web carried by the folding drum into the nip of the folding rollers.
Claim 3
Dependent Claim
72 words
A flying tucker folder according to claim 1 wherein the planet gear means is a toothed pulley, and the sun gear means is a timing belt pulley, and a timing belt meshing with the toothed pulleys and the timing belt pulley whereby rotation of the folding drum imparts rotational drive to the tucker blade shafts and the oscillating means imparts to the tucker blade shafts a decrease or increase in rotational speed.
Claim 4
Dependent Claim
47 words
A flying tucker folder according to claim 1 wherein the oscillatory mechanism imparts additive and subtractive speeds of rotation to the tucker blade shafts whereby the tips of the tucker blades will follow a substantIally elliptical path of travel in a half revolution of the folding drum.
Claim 5
Dependent Claim
75 words
A flying tucker folder according to claim 1, and including a shaft about which the folding cylinder rotates and on which the sun gear is mounted, and wherein the oscillating means is provided to oscillate said shaft about which the folding drum rotates, such oscillation oscillating the sun gear in the same or opposite direction of rotation of the folding drum to impart to the tucker blade shafts a decrease or increase in rotational speed.
Claim 6
Dependent Claim
24 words
A flying tucker folder according to claim 4 wherein oscillation of the shaft is effected by a crank mechanism associated with the cutting cylinder.
Claim 7
Dependent Claim
53 words
A flying tucker folder according to claim 5 wherein the shaft of the cutting cylinder has secured thereto a crank with links pivotally interconnecting the crank with the shaft on which the folding drum rotates whereby rotation of the crank will impart oscillatory motion to the shaft on which the folding drum rotates.
Claim 8
Dependent Claim
57 words
A flying tucker folder according to claim 6 wherein the folding drum comprises an apertured cylinder provided with end plates, one of which end plates has secured thereto a gear wheel meshing with a gear wheel secured to the shaft of the cutting cylinder to obtain transmission and synchronism of drive between folding drum and cutting cylinder.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |