US5646735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand-held instrument for reflection measuring of optical density and color on printed sheets
Assignee: Individual
•
Filing: 1995-10-04
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Granted: 1997-07-08
•
Expires: 2015-10-04
Abstract
Abstract To enable top illumination densitometers in the form of a hand-held instrument to be used not only for measuring light reflections but also for transmission of the test data to a computer, a hand-held instrument is provided comprising an instrument housing with a measuring head and an electronic control unit in the housing for converting the values measured in the measuring plane of the sheet. The housing contains an electronic computer input system connected to the electronic control unit, at least one click knob operable externally on the housing, and a control element for the inputs to the computer input system and a junction box for an interface for transmission of the measured data converted in the electronic control unit into signals to a computer.
Inventors
- 👤 Harald Krzyminski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:55
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/47; G01N21/4738; G01N21/474; G01J; G01J3/00; G01J3/02; G01J3/0264; G01J3/0272
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
109 words
A hand-held instrument for reflection measuring of optical density and colour on a printed sheet, comprising: an instrument housing; a measuring head and an electronic control unit provided in the housing for converting the values measured in the measuring plane of the printed sheet; an electronic computer input system connected to the electronic control unit in the housing, said computer input system including at least one click knob operable externally on the housing, and a control element for the inputs to the computer input system; and a junction box for an interface for transmission of the measured data converted into signals in the electronic control unit to a computer.
Claim 2
Dependent Claim
109 words
A hand-held instrument for reflection measuring of optical density and colour on a printed sheet, comprising: an instrument housing; a measuring head and an electronic control unit provided in the housing for converting the values measured in the measuring plane of the printed sheet; an electronic computer input system connected to the electronic control unit in the housing, said computer input system including at least one click knob operable externally on the housing, and a control element for the inputs to the computer input system; and a junction box for an interface for transmission of the measured data converted into signals in the electronic control unit to a computer.
Claim 3
Dependent Claim
13 words
The hand-held instrument of claim 1, wherein the control element is a trackball.
Claim 4
Dependent Claim
18 words
The hand-held instrument of claim 1, wherein the control element is a mercury switch tiltable in all directions.
Claim 5
Dependent Claim
42 words
The hand-held instrument of claim 1, wherein the computer input system has an additional click knob for the start of the measurement, and wherein the electronic control unit has electronic elements for the automatic transmission of the measuring data to the computer.
Claim 6
Dependent Claim
34 words
The hand-held instrument of claim 1, wherein a maxtrix display capable of displaying graphical illustrations and being connected to the electronic control unit and the computer input system is visibly installed on the housing.
Claim 7
Dependent Claim
43 words
The hand-held instrument of claim 1, wherein said junction box interface is bidirectional for reciprocal interchange of data between the computer and the measuring instrument, and wherein another interface element and memory are arranged between the junction box and the electronic control unit.
Claim 8
Dependent Claim
35 words
The hand-held instrument of claim 6, wherein the junction box is connected to a power line of the computer and wherein the electronic control unit includes electronic elements for adaptating and keeping the voltage constant.
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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) | 2000-07-07 | 2001-01-06 | 2001-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-07-07 | 2005-01-06 | 2005-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-07-07 | 2009-01-06 | 2009-07-08 | $7700.00 | Window Closed / Lapsed |