Patent US3835775A successfully refreshed from Google Patents.
US3835775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gravure printing press with endless printing belts
Assignee: Individual
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Filing: 1972-10-10
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Granted: 1974-09-17
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Expires: 1992-10-10
Abstract
Abstract A printing press includes a large drum driven rotatably. A continuous printing web, of paper or other material, is wound about the circumferential surface of the drum and pulled by the drum from a supply reel and delivered to a driven take-up reel. A plurality of printing units are positioned about the circumferential surface of the rotatable drum at spaced-apart locations. One or more of these units may be gravure units, as for printing different colors. These gravure units include endless gravure belts driven at a speed corresponding to that of the peripheral surface of the drum. The length of the gravure belt is variable, thereby to provide a variable cut off or image length. Floating pressure rollers press the gravure belts against the printing web and against the drum periphery. Alignment means are provided for aligning the gravure belts with the drum.
Inventors
- 👤 R Benton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:18
CPC Classifications
B; B41; B41F; B41F9/00; B41F17/00; B41F17/007
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
172 words
Printing apparatus comprising: a. a cylindrical drum mounted for rotation; b. a continuous printing web entrained about the peripheral surface of said drum; c. at least one movable endless belt carrying image areas on a surface facing the web on the peripheral surface of said drum and adjacent thereto at at least one point; d. means for rotating said drum; e. means for moving said image-carrying belt; f. pressure means for urging said image-carrying belt against said web on the peripheral surface of said drum at said point Of adjacency; g. said pressure means comprising a floating pressure roller; h. a sub-housing having a chamber in which said pressure roller is floated; i. said sub-housing having a wall facing said web, said wall having an opening therein; and j. pressurized air supply means providing high pressure air to said chamber for urging said floating pressure roller toward said opening in said wall of said sub-housing and for causing a portion of said pressure roller to project from said wall of said sub-housing.
Claim 2
Dependent Claim
172 words
Printing apparatus comprising: a. a cylindrical drum mounted for rotation; b. a continuous printing web entrained about the peripheral surface of said drum; c. at least one movable endless belt carrying image areas on a surface facing the web on the peripheral surface of said drum and adjacent thereto at at least one point; d. means for rotating said drum; e. means for moving said image-carrying belt; f. pressure means for urging said image-carrying belt against said web on the peripheral surface of said drum at said point Of adjacency; g. said pressure means comprising a floating pressure roller; h. a sub-housing having a chamber in which said pressure roller is floated; i. said sub-housing having a wall facing said web, said wall having an opening therein; and j. pressurized air supply means providing high pressure air to said chamber for urging said floating pressure roller toward said opening in said wall of said sub-housing and for causing a portion of said pressure roller to project from said wall of said sub-housing.
Claim 3
Dependent Claim
21 words
Printing apparatus according to claim 1 wherein: a. said movable image-carrying belt is an endless gravure belt having image wells therein.
Claim 4
Dependent Claim
59 words
Printing apparatus according to claim 1 wherein: a. a pair of spaced-apart sprocket rollers are provided each rotatable about a vertical axis and about which said endless belt is trained; b. said sprocket rollers are so positioned that one reach of said belt is along a line tangent to the periphery of said drum at said point of adjacency.
Claim 5
Dependent Claim
25 words
Printing apparatus according to claim 1 wherein a plurality of movable image-carrying endless belts are provided at spaced-apart positions about the periphery of said drum.
Claim 6
Dependent Claim
72 words
Printing apparatus according to claim 4 wherein: a. at least two of said movable image-carrying belts are gravure belts each of which has a reach movable along a line tangent to the periphery of said drum at a different spaced-apart point; b. one of said gravure belts carries in its image wells ink of one color and the other of said gravure belts carries in its image wells ink of another color.
Claim 7
Dependent Claim
51 words
Printing apparatus according to claim 1 wherein: a. said cylindrical drum is made of ferro concrete with steel rod reinforcements; b. said concrete has an annular steel band embracing its periphery; c. said annular steel band is reinforced against centrifugal forces by having wrapped thereabout a continuous filament of high-strength material.
Claim 8
Dependent Claim
13 words
Printing apparatus according to claim 6 wherein said high-strength material is mono-filament fiberglass.
Claim 9
Dependent Claim
14 words
Printing apparatus according to claim 6 wherein said high-strength material is high tensile wire.
Claim 10
Dependent Claim
44 words
Printing apparatus according to claim 6 wherein: a. the peripheral surface of said drum is provided with radially-extending locating pins; b. the peripheral surface of said floating pressure roll is provided with an annular recess for receiving the projecting ends of said locating pins.
Claim 11
Dependent Claim
31 words
Printing apparatus according to claim 1 wherein: a. high pressure fluid means are provided for lifting said drum slightly off its mounting to allow for substantially friction-free rotation of said drum.
Claim 12
Dependent Claim
55 words
Printing apparatus according to claim 1 wherein: a. said continuous web is obtained from a supply roll and wound around the peripheral surface of said drum; b. take-up means are provided for receiving said web after it has passed around the periphery of said drum; c. drive means are provided for driving said take-up means.
Claim 13
Dependent Claim
58 words
Printing apparatus according to claim 1 wherein: a. said drum is mounted for rotation in a horizontal plane about a vertical axis; b. said continuous printing web is vertically disposed on the vertical peripheral surface of said drum; c. said image area surface of said endless belt is vertically disposed at the point of adjacency to said web.
Claim 14
Dependent Claim
149 words
Printing apparatus according to claim 12 wherein: a. a second cylindrical drum is provided mounted for rotation about a vertical axis and having a substantially vertical peripheral surface; b. at least one movable second endless belt which carried image areas on a substantially vertical surface is provided for said second drum, said second image-carrying surface facing the peripheral surface of said second drum and being adjacent thereto at at least one point; c. means are provided for interposing said continuous web in vertically-disposed positioN between said second image-carrying belt and said peripheral surface of said second drum at said point of adjacency; d. pressure means are provided for urging said second image-carrying belt against said interposed web and said peripheral surface of said second drum; and e. said continuous web being common to said first and second drums but having opposite surfaces facing said first and second image-carrying belts.
Claim 15
Dependent Claim
60 words
Printing apparatus according to claim 1 wherein: a. said wall of said sub-housing facing said web having an opening therein toward which said floating pressure roller is urged by said pressurized air supply means is semi-circular in cross-section; b. said pressurized air supply means includes air jets positioned to prevent said roller from engaging the surface of said semi-circular wall.
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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 |