US3727550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjusting arrangement for ink fountain in printing press
Assignee: Boeing North American Inc
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Filing: 1971-09-13
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Granted: 1973-04-17
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Expires: 1991-09-13
Abstract
Abstract An arrangement for adjusting the blade in an ink fountain which includes a set of rotatable keys, each of the keys carrying a frictionally engaged radial stop cooperating with a fixed stop to limit the angle of the adjusting movement of the key. A tool fitting is provided at the outer end of each key for manually rotating the key, with the stops in engagement, to adjust minimum blade clearance. A frictionally engaged pointer coupled to the key, is settable in accordance with the position of the radial stop to provide constant visual indication of the key adjustment. Each key has an electric friction type clutch for coupling the key to a rotatable shaft to provide running adjustment of running film thickness. The friction connection between the radial stop and the key is set to permit manual overpowering of the connection, and hence a change in the phasing of the radial stop, by a tool fitting on the outer end of the key in order to take up for blade wear and reestablish minimum clearance.
Inventors
- 👤 R Easoz
- 👤 N Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:48
CPC Classifications
B; B41; B41F; B41F31/00; B41F31/02; B41F31/04; B41F31/045
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
239 words
In an ink fountain the combination comprising a frame mounting a rotatable fountain roller, a fountain blade on the frame having its edge cooperating with the roller a plurality of keys spaced evenly along the blade for adjusting the thickness of a film of ink deposited on the roller, each key having a shank threaded into the frame with a blade-engaging tip at its inner end and a presented outer end, a collet adjacent the outer end, the collet including a longitudinally slotted inner collar snugly telescoped on the shank, a radial stop on the inner collar, a fixed stop on the frame in the path of movement of the radial stop, the collet further including an outer collar threaded over the inner collar to establish a predetermined level of frictional reaction torque so that the key may be turned in the advancing direction with the stops in engagement to establish a condition of minimum clearance between the blade and the roller following which the key may be rotated over substantially a single revolution in the retract direction to establish a running clearance for the production of an ink film of predetermIned thickness, the presented outer end of the key having a tool fitting for attachment of a tool for forcible rotation of the key in the advancing direction beyond the point of bottoming of the stops for periodic takeup for wear occurring at the edge of the blade.
Claim 2
Dependent Claim
239 words
In an ink fountain the combination comprising a frame mounting a rotatable fountain roller, a fountain blade on the frame having its edge cooperating with the roller a plurality of keys spaced evenly along the blade for adjusting the thickness of a film of ink deposited on the roller, each key having a shank threaded into the frame with a blade-engaging tip at its inner end and a presented outer end, a collet adjacent the outer end, the collet including a longitudinally slotted inner collar snugly telescoped on the shank, a radial stop on the inner collar, a fixed stop on the frame in the path of movement of the radial stop, the collet further including an outer collar threaded over the inner collar to establish a predetermined level of frictional reaction torque so that the key may be turned in the advancing direction with the stops in engagement to establish a condition of minimum clearance between the blade and the roller following which the key may be rotated over substantially a single revolution in the retract direction to establish a running clearance for the production of an ink film of predetermIned thickness, the presented outer end of the key having a tool fitting for attachment of a tool for forcible rotation of the key in the advancing direction beyond the point of bottoming of the stops for periodic takeup for wear occurring at the edge of the blade.
Claim 3
Dependent Claim
214 words
In an ink fountain the combination comprising a frame mounting a rotatable fountain roller, a fountain blade on the frame extending along the roller and having its edge cooperating therewith, a plurality of keys spaced evenly along the blade for adjusting the thickness of a film of ink deposited on the roller, each key having a shank threaded into the frame with a blade-engaging tip at its inner end and having an outer presented end, a fixed stop on the frame, a cooperating radial stop on the shank of the key to define, upon bottoming, a condition of minimum clearance between the blade and the roller, an electric clutch surrounding the shank having an output element keyed to the shank and having an input element with means for rotating the input element, a first frictional coupling interposed between the radial stop and the shank and a frictional drive coupling interposed between input and output elements of the clutch, means for setting the friction in the first frictional coupling so that the reactive torque substantially exceeds the reaction torque of the frictional drive coupling so that when the radial stop bottoms on the fixed stop slippage takes place at the frictional drive coupling thereby preserving the phase condition between the radial stop and the key.
Claim 4
Dependent Claim
214 words
In an ink fountain the combination comprising a frame mounting a rotatable fountain roller, a fountain blade on the frame extending along the roller and having its edge cooperating therewith, a plurality of keys spaced evenly along the blade for adjusting the thickness of a film of ink deposited on the roller, each key having a shank threaded into the frame with a blade-engaging tip at its inner end and having an outer presented end, a fixed stop on the frame, a cooperating radial stop on the shank of the key to define, upon bottoming, a condition of minimum clearance between the blade and the roller, an electric clutch surrounding the shank having an output element keyed to the shank and having an input element with means for rotating the input element, a first frictional coupling interposed between the radial stop and the shank and a frictional drive coupling interposed between input and output elements of the clutch, means for setting the friction in the first frictional coupling so that the reactive torque substantially exceeds the reaction torque of the frictional drive coupling so that when the radial stop bottoms on the fixed stop slippage takes place at the frictional drive coupling thereby preserving the phase condition between the radial stop and the key.
Claim 5
Dependent Claim
56 words
The combination as claimed in claim 2 in which a tool fitting is provided on the presented outer end of the key for forcibly turning the key in the advancing direction with the stops in engagement for overpowering the first friction connection for periodically reestablishing the condition of minimum clearance between the blade and the roller.
Claim 6
Dependent Claim
55 words
The combination as claimed in claim 3 including a longitudinally extending panel having apertures registering with the presented ends of the keys, the presented ends of the keys having pointers frictionally secured thereon for indicating the position of the radial stop, the panel having calibrated scales surrounding the apertures for cooperation with the respective pointers.
Claim 7
Dependent Claim
239 words
In an ink fountain the combination comprising a frame mounting a rotatable fountain roller, a fountain blade on the frame having its edge cooperating with the roller, a plurality of keys spaced evenly along the blade for adjusting the thickness of ink film deposited on the roller, each key having a shank threaded into the frame with a blade-engaging tip at its inner end and a presented outer end, an electric clutch of annular shape telescoped over the shank and having an output element secured to the shank and an input element including a sleeve extending along the shank and terminating in a drive gear, a reversible drive shaft for cooperating with the gears of all of the keys for simultaneous driving of the gears so that when one of the clutches is energized the corresponding key is adjustably rotated, a collet telescoped over the shank of each key at its outer end and in frictional engagement with it, a radial stop on the collet, a fixed stop on the frame in the path of the radial stop for defining the range of rotational adjusting movement of the key, and a tool fitting at the outer end of the key for enabling forcible turning of the key in the advancing direction with the stops in engagement to overcome the reaction torque of the collet thereby to establish a limit condition of minimum clearance between the blade and the roller.
Claim 8
Dependent Claim
239 words
In an ink fountain the combination comprising a frame mounting a rotatable fountain roller, a fountain blade on the frame having its edge cooperating with the roller, a plurality of keys spaced evenly along the blade for adjusting the thickness of ink film deposited on the roller, each key having a shank threaded into the frame with a blade-engaging tip at its inner end and a presented outer end, an electric clutch of annular shape telescoped over the shank and having an output element secured to the shank and an input element including a sleeve extending along the shank and terminating in a drive gear, a reversible drive shaft for cooperating with the gears of all of the keys for simultaneous driving of the gears so that when one of the clutches is energized the corresponding key is adjustably rotated, a collet telescoped over the shank of each key at its outer end and in frictional engagement with it, a radial stop on the collet, a fixed stop on the frame in the path of the radial stop for defining the range of rotational adjusting movement of the key, and a tool fitting at the outer end of the key for enabling forcible turning of the key in the advancing direction with the stops in engagement to overcome the reaction torque of the collet thereby to establish a limit condition of minimum clearance between the blade and the roller.
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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |