The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 15, 1999
Filed:
Apr. 28, 1997
Other;
Abstract
The invention relates to a procedure for determining a quantity dependent on the rate of diffusion in the fibre wall for diffusion occurring through it, in which procedure a diffusible tracer is introduced into the fibres under measurement, the fibres are suspended in an aqueous phase and the tracer concentration is determined after a certain time has elapsed since the time of suspension of the fibres, and the quantity dependent on the rate of diffusion is calculated on the basis of the concentration and time. In addition, the invention relates to a procedure for determining the proportion of secondary fibre in a fibre suspension containing primary fibre and secondary fibre, in which procedure virtual diffusion coefficients are determined in the fibre wall for diffusion taking place through it in at least two fibre suspensions for which the proportions of primary and secondary fibre are known and in a fibre suspension under measurement, and that the proportion of secondary fibre in the suspension under measurement is estimated by assuming that the diffusion coefficient depends mainly linearly on the proportion of primary and secondary fibre in the fibre suspension.