Patent ID: 11871782
Assignee: JAPAN TOBACCO INC.
Field: Measurement (Instruments)
Classification: CPC A  D  G | IPC A  D  G

Claim 2:
3. A multifilter segment inspection method comprising:
a) a step of preparing a plurality of filter segments in which outer surfaces of filter materials are covered with inner wrappers;
b) a step of selecting filter segments from the plurality of filter segments such that CIELab color parameters of the inner wrappers of filter segments to be adjacent to each other are different from each other, causing red, blue or green light or light having a combination of two or more types to pass through each of the filter segments to be adjacent to each other and have bleaching strengths different from each other, and measuring a transmitted light intensity in each color;
c) a step of calculating the transmitted light intensity ratio by dividing a high transmitted light intensity in a color of one of the filter segments to be adjacent to each other by a low transmitted light intensity in the color of the other filter segment;
d) a step of selecting a combination of filter segments in which the transmitted light intensity ratio calculated in the c) step between the filter segments to be adjacent to each other is greater than or equal to 1.6, and a color of used light in advance;
e) a step of assembling a multifilter segment in which a plurality of filter segments are connected and integrated by winding an outer wrapper which does not affect a color transparency of the adjacent filter segments which satisfy the transmitted light intensity ratio of 1.6 or greater around outer surfaces of the inner wrappers by arranging the filter segments of the combination selected in the d) step face-to-face; and
f) a step of causing the light of the color selected in the d) step to pass through the multifilter segment and detecting a length of the adjacent filter segments and a face-to-face state between the filter segments,
wherein the outer wrapper is white paper,
wherein the outer wrapper does not affect a color transparency of the adjacent filter segments which satisfy the transmitted light intensity ratio of 1.6 or greater, and
wherein the outer wrapper has an opacity of 70% or less.