Patent US4095240A successfully refreshed from Google Patents.
US4095240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust system for pyrographic printer
Assignee: Xerox Corp
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Filing: 1976-09-13
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Granted: 1978-06-13
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Expires: 1996-09-13
Abstract
Abstract A pyrographic printer comprises an exhaust system having an elongated inlet and a bifurcated throat. The inlet is adjacent to and substantially coextensive with the path of travel for the stylus, and the throat is configured to define a main passage which leads away from the inlet and a branch passage which loops back toward the inlet. To increase the vacuum drawn in the immediate proximity of the stylus, the input impedance of the exhaust system is selectively reduced in that region. For that purpose, the stylus carriage carries a baffle which extends into the throat to more or less seal a stylus aligned segment of the branch passage.
Inventors
- 👤 Takayuki Tsutsui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:46
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/06; G01D15/10; H; H04; H04N; H04N1/00; H04N1/23
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
102 words
In combination with a pyrographic printer having a stylus mounted for movement along a predetermined path to print an image on a recording medium, an exhaust system for collecting waste products released by said recording medium as the image is being printed; said exhaust system comprising means for defining an elongated inlet opening substantially adjacent to and coextensive with the entire path of movement for said stylus; means for establishing a non-uniform vacuum substantially entirely along said inlet opening, including means for maintaining a relatively strong portion of said vacuum in alignment with said stylus as said stylus moves along said path.
Claim 2
Dependent Claim
102 words
In combination with a pyrographic printer having a stylus mounted for movement along a predetermined path to print an image on a recording medium, an exhaust system for collecting waste products released by said recording medium as the image is being printed; said exhaust system comprising means for defining an elongated inlet opening substantially adjacent to and coextensive with the entire path of movement for said stylus; means for establishing a non-uniform vacuum substantially entirely along said inlet opening, including means for maintaining a relatively strong portion of said vacuum in alignment with said stylus as said stylus moves along said path.
Claim 3
Dependent Claim
60 words
The combination of claim 1 wherein said means for establishing said vacuum includes a throat having a main passage leading away from said inlet and a branch passage looping back toward said inlet, and a baffle mounted for movement with said stylus and extending into said throat to at least partially seal a stylus aligned segment of said branch passage.
Claim 4
Dependent Claim
73 words
The combination of claim 2 wherein said branch passage has inlet and outlet ports leading to and from, respectvely, said main passage at one side of said main passage, and said baffle extends into said throat substantially perpendicularly to the path of movement of said stylus and in sliding engagement with said one side of said main passage to a depth sufficient to overlie the inlet and outlet ports of said branch passage.
Claim 5
Dependent Claim
107 words
The combination of claim 1 wherein said printer comprises a rotatable drum for supporting said recording medium, and a linearly translatable carriage for transporting said stylus along said path; and said means for establishing said vacuum includes a bifurcated throat for providing a main air flow passage leading away from said inlet and a branch air flow passage looping back toward said inlet, and a baffle mounted on said carriage for movement with said stylus; said baffle extending into said throat substantially perpendicularly relative to the path of movement of said stylus in position to at least partially seal a stylus aligned segment of said branch passage.
Claim 6
Dependent Claim
49 words
The combination of claim 4 wherein said branch passage has inlet and outlet ports at one side of said main passage, and said baffle is maintained in sliding engagement with said one side of said main passage and is of sufficient length to overlie said inlet and outlet ports.
Claim 7
Independent Claim
72 words
A method for collecting waste products released in a pyrographic printer as a stylus moves along a predetermined path to print an image on a recording medium, said method comprising the steps of establishing a non-uniform vacuum substantially adjacent to and coextensive with the entire path of movement for said stylus, and maintaining a relatively strong portion of said vacuum in alignment with said stylus as said stylus moves along said path.
Claim 8
Independent Claim
72 words
A method for collecting waste products released in a pyrographic printer as a stylus moves along a predetermined path to print an image on a recording medium, said method comprising the steps of establishing a non-uniform vacuum substantially adjacent to and coextensive with the entire path of movement for said stylus, and maintaining a relatively strong portion of said vacuum in alignment with said stylus as said stylus moves along said path.
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) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |