US3835774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device in offset printing presses for controlling the supply of dampening liquid to dampening equipment of the presses
Assignee: Heidelberger Druckmaschinen AG
•
Filing: 1972-11-21
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Granted: 1974-09-17
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Expires: 1992-11-21
Abstract
Abstract Offset printing press having a main motor and dampening equipment includes a device for automatically controlling a supply of dampening liquid to the dampening equipment. The device includes an adjusting motor which has a rotary shaft and which is connected to the main motor for controlling the rotary speed thereof, a control cam secured to the shaft, as for example, illustrated in U.S. Pat. No. 2,561,837, and control member means operatively engageable by the control cam for determining the amount of liquid supplied from a source thereof to the dampening equipment.
Inventors
- 👤 H Heidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:00
CPC Classifications
B; B41; B41F; B41F33/00; B41F33/0054; B41F7/00; B41F7/20; B41F7/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
167 words
In an offset printing press having a main motor adapted to rotate the press at different speeds and dampening equipment for supplying dampening liquid to the press, the combination therewith of a device for automatically controlling a predetermined supply of dampening liquid to the dampening equipment, in accordance with the press speed, comprising an adjusting moTor connected to the main motor for controlling the rotary speed thereof, said adjusting motor having a rotary shaft, a source of dampening liquid for supplying liquid to said dampening equipment, control member means for regulating the flow of dampening liquid from said source to said dampening equipment, a control cam secured to said shaft of said adjusting motor, said control member means operatively engageable by said control cam to vary the amount of liquid supplied from said source to the dampening equipment in accordance with the press speed, said control cam having a curved surface to activate said control member means to supply predetermined amounts of liquid at different press speeds.
Claim 2
Dependent Claim
167 words
In an offset printing press having a main motor adapted to rotate the press at different speeds and dampening equipment for supplying dampening liquid to the press, the combination therewith of a device for automatically controlling a predetermined supply of dampening liquid to the dampening equipment, in accordance with the press speed, comprising an adjusting moTor connected to the main motor for controlling the rotary speed thereof, said adjusting motor having a rotary shaft, a source of dampening liquid for supplying liquid to said dampening equipment, control member means for regulating the flow of dampening liquid from said source to said dampening equipment, a control cam secured to said shaft of said adjusting motor, said control member means operatively engageable by said control cam to vary the amount of liquid supplied from said source to the dampening equipment in accordance with the press speed, said control cam having a curved surface to activate said control member means to supply predetermined amounts of liquid at different press speeds.
Claim 3
Dependent Claim
32 words
Offset printing machine according to claim 1 wherein the main motor is provided with collector brushes, said adjusting motor being connected to said collector brushes for varying the position of said brushes.
Claim 4
Dependent Claim
48 words
Offset printing machine according to claim 1, wherein said control member means comprises a control member and said control valve operatively connected to said control member, said control member being engageable by said control cam so as to actuate said control valve to control flow of liquid therethrough.
Claim 5
Dependent Claim
45 words
Offset printing machine according to claim 1, wherein the dampening equipment includes an immersion roller and rotary speed control therefor, said control member means comprising a control member engageable by said control cam and operatively connected to the rotary speed control for the immersion roller.
Claim 6
Independent Claim
138 words
A method of automatically controlling a predetermined supply of dampening liquid to dampening equipment in accordance with press speed of an offset printing press having a main motor adapted to rotate the press at different speeds and dampening equipment for supplying dampening liquid to the press, which comprises supplying liquid to said dampening equipment from a source of dampening liquid, regulating the flow of dampening liquid from said source to said dampening equipment by means of a control member, varying the amount of liquid supplied from said source to said dampening equipment by a control cam having a curved surface to activate said control member to supply predetermined amounts of liquid at different press speeds, and simultaneously moving said control cam with change of press speed to effect flow of predetermined amount of liquid at each press speed.
Claim 7
Independent Claim
138 words
A method of automatically controlling a predetermined supply of dampening liquid to dampening equipment in accordance with press speed of an offset printing press having a main motor adapted to rotate the press at different speeds and dampening equipment for supplying dampening liquid to the press, which comprises supplying liquid to said dampening equipment from a source of dampening liquid, regulating the flow of dampening liquid from said source to said dampening equipment by means of a control member, varying the amount of liquid supplied from said source to said dampening equipment by a control cam having a curved surface to activate said control member to supply predetermined amounts of liquid at different press speeds, and simultaneously moving said control cam with change of press speed to effect flow of predetermined amount of liquid at each press speed.
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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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |