Method and measuring machine for analyzing a paper web
AssigneeStora Kopparbegs Bergslags AB
InventorBengt Lind
Life of this patent
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Abstract
A method and a measuring machine for analyzing at least one property of a paper web (7). According to the invention a jumbo roll (5) from a paper machine is placed in a measuring machine and its paper web (7) is conveyed from an unreeling section (1), through a measuring section (3) to a reeling section (2). A measuring sequence is performed which comprises stepwise feeding of the paper web and measuring the property in the measuring section, when the paper web is stationary, within a web-width measuring area which in the machine direction corresponds to said step length, by scanning traversing a measuring sensor. The values recorded are transmitted to a computer unit for processing and conversion to a visual form.
Claims12
A method of analyzing at least one property of a paper web (7) manufactured in a defined paper machine from which jumbo rolls (5) are supplied, characterized in that a jumbo roll (5) from said paper machine is placed in a measuring machine,
- that the paper web (7) is conveyed from an unreeling section (1) for the jumbo roll (5), through a measuring section (3) to a reeling section (2) for winding the paper web (7) to form a new reel (11),
- that a first measuring sequence is performed which comprises feeding the paper web (7) in a plurality of steps having the same predetermined length and measuring said property in the measuring section (3), when the paper web (7) is stationary, within a web-width measuring area which in the machine direction corresponds, or substantially corresponds to said step length, by scanning traversing a measuring sensor, in order to measure said property from one edge of the paper web (7) to the other within said measuring area, and
- that the measured values recorded by the measuring sensor are transmitted to a computer unit for processing and conversion of the measured values to a visual form which indicates variations of the property within an area of the paper web (7) defined by said steps.
A measuring machine for analyzing at least one property of a paper web (7) manufactured in a defined paper machine from which jumbo rolls (5) are supplied, characterized in
- that it comprises an unreeling section (1) to support and rotatably journalling a jumbo roll (5) from said paper machine, a reeling section (2) for winding the paper web (7) of the jumbo roll (5) to form a new reel (11) and a measuring section (3) situated between them through which the paper web (7) passes,
- that the measuring section (3) comprises traversing scanners having a measuring sensor for measuring said property,
- that the reeling section (2) includes drive means arranged to produce stepwise movement of the paper web (7) through the measuring section (3), and
- that the measuring section (3) includes a computer unit for storing the measured values recorded by the measuring sensor and processing these values for visual presentation of variations of the property.
Dependencies are inferred from the claim text.