US3854586A - Automatic grader for sorting objects according to brightness and color tones - Google Patents
Automatic grader for sorting objects according to brightness and color tones Download PDFInfo
- Publication number
- US3854586A US3854586A US00360570A US36057073A US3854586A US 3854586 A US3854586 A US 3854586A US 00360570 A US00360570 A US 00360570A US 36057073 A US36057073 A US 36057073A US 3854586 A US3854586 A US 3854586A
- Authority
- US
- United States
- Prior art keywords
- articles
- invention defined
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- color
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 235000019646 color tone Nutrition 0.000 title claims abstract description 38
- 230000003595 spectral effect Effects 0.000 claims abstract description 51
- 238000002310 reflectometry Methods 0.000 claims abstract description 32
- 241000208125 Nicotiana Species 0.000 claims abstract description 7
- 235000002637 Nicotiana tabacum Nutrition 0.000 claims abstract description 7
- 230000002596 correlated effect Effects 0.000 claims 12
- 230000010354 integration Effects 0.000 claims 6
- 230000003287 optical effect Effects 0.000 claims 6
- 239000003990 capacitor Substances 0.000 claims 4
- 238000005070 sampling Methods 0.000 claims 4
- 238000001228 spectrum Methods 0.000 claims 4
- 230000000875 corresponding effect Effects 0.000 claims 3
- 230000007717 exclusion Effects 0.000 claims 2
- 230000001276 controlling effect Effects 0.000 claims 1
- 238000012163 sequencing technique Methods 0.000 claims 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B1/00—Preparation of tobacco on the plantation
- A24B1/04—Sifting, sorting, cleaning or removing impurities from tobacco
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B13/00—Control arrangements specially adapted for wet-separating apparatus or for dressing plant, using physical effects
- B03B13/02—Control arrangements specially adapted for wet-separating apparatus or for dressing plant, using physical effects using optical effects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/36—Sorting apparatus characterised by the means used for distribution
- B07C5/363—Sorting apparatus characterised by the means used for distribution by means of air
- B07C5/365—Sorting apparatus characterised by the means used for distribution by means of air using a single separation means
- B07C5/366—Sorting apparatus characterised by the means used for distribution by means of air using a single separation means during free fall of the articles
Definitions
- Logic circuitry is provided to constrain acceptance or rejection of the leaves or objects by the system in response to a determination that at least one of the characteristics of brightness and two color tones exceeds a predetermined deviation from the preset standards.
- One of the spectral bands is chosen to provide uniform reflectivity from the series of leaves or objects being sorted to normalize the size of the various objects to that of the background surface.
- FIG 50 ⁇ UI ⁇ l 2 M Q E I VAN A A m 5 m $xw s s s e M a 0mm E SSS mw Tc: C A DE PF. US
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Spectrometry And Color Measurement (AREA)
- Manufacture Of Tobacco Products (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Sorting Of Articles (AREA)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00360570A US3854586A (en) | 1973-05-15 | 1973-05-15 | Automatic grader for sorting objects according to brightness and color tones |
CH178874A CH577677A5 (de) | 1973-05-15 | 1974-02-08 | |
DE2415752A DE2415752C2 (de) | 1973-05-15 | 1974-04-01 | Gerät zur Bestimmung der Helligkeit und der Farbtöne von Gegenständen |
GB1583874A GB1460527A (en) | 1973-05-15 | 1974-04-10 | Automatic grader for sorting objects according to brightness and colour tones |
CA198,791A CA998645A (en) | 1973-05-15 | 1974-05-03 | Grading of objects using sensed brightness and color tones of both background and object |
JP49053489A JPS5743233B2 (de) | 1973-05-15 | 1974-05-15 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00360570A US3854586A (en) | 1973-05-15 | 1973-05-15 | Automatic grader for sorting objects according to brightness and color tones |
Publications (1)
Publication Number | Publication Date |
---|---|
US3854586A true US3854586A (en) | 1974-12-17 |
Family
ID=23418569
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00360570A Expired - Lifetime US3854586A (en) | 1973-05-15 | 1973-05-15 | Automatic grader for sorting objects according to brightness and color tones |
Country Status (6)
Country | Link |
---|---|
US (1) | US3854586A (de) |
JP (1) | JPS5743233B2 (de) |
CA (1) | CA998645A (de) |
CH (1) | CH577677A5 (de) |
DE (1) | DE2415752C2 (de) |
GB (1) | GB1460527A (de) |
Cited By (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4222731A (en) * | 1978-01-09 | 1980-09-16 | Leo Enrietti | Molding press for plastic materials |
DE3428966A1 (de) * | 1984-08-06 | 1986-02-06 | Institut po Techničeska Kibernetika i Robotika, Sofia/Sofija | Verfahren und vorrichtung zum sortieren von tabakblaettern |
US4609108A (en) * | 1984-01-27 | 1986-09-02 | Institute Po Technicheska Kibernetika I Robotika | Tobacco sorting method and apparatus |
US4634881A (en) * | 1982-11-09 | 1987-01-06 | Supernova Systems, Inc. | Apparatus for detecting impurities in translucent bodies |
US4940850A (en) * | 1987-02-14 | 1990-07-10 | Satake Engineering Co., Ltd. | Color sorting apparatus |
DE3490661C2 (de) * | 1984-02-21 | 1992-02-13 | Aleksandr Zamotaev | Optisches Verfahren zum Fruchtsortieren nach Fruchtqualit{t und Vorrichtung zur Durchf}hrung dieses Verfahrens |
US5265732A (en) * | 1991-05-21 | 1993-11-30 | Esm International, Inc. | Variable background for a sorting machine |
WO2000058035A1 (en) * | 1999-03-29 | 2000-10-05 | Src Vision, Inc. | Multi-band spectral sorting system for light-weight articles |
US20050199252A1 (en) * | 2004-03-15 | 2005-09-15 | Universal Leaf Tobacco Company, Inc. | Apparatus and method for scanning and sorting tobacco leaves |
EP2107361A1 (de) * | 2008-04-02 | 2009-10-07 | Unilever PLC | Verfahren und Vorrichtung zur Analyse von Pflanzenmaterial |
US20110067714A1 (en) * | 2009-09-18 | 2011-03-24 | Harry Drewes | Apparatus and method for post-threshing inspection and sorting of tobacco lamina |
CN102871211A (zh) * | 2012-09-13 | 2013-01-16 | 红云红河烟草(集团)有限责任公司 | 一种提高复烤成品片烟中片率的方法 |
US20130065250A1 (en) * | 2010-03-19 | 2013-03-14 | Michael James Hubbard | Kit and Method for Detecting Porous Dental Hydroxyapatite |
CN103211292A (zh) * | 2013-03-20 | 2013-07-24 | 湖南中烟工业有限责任公司 | 一种片烟分段精选设备及方法 |
CN103844344A (zh) * | 2014-03-11 | 2014-06-11 | 上海烟草集团有限责任公司 | 一种调控不同批次卷烟烟丝质量均匀性的方法及其应用 |
CN103976468A (zh) * | 2014-04-30 | 2014-08-13 | 河南科技大学 | 一种烟叶分级方法 |
CN104585856A (zh) * | 2014-12-18 | 2015-05-06 | 红云红河烟草(集团)有限责任公司 | 一种基于原料品质动态变化的烟叶分组方法 |
CN104783320A (zh) * | 2015-02-17 | 2015-07-22 | 福建省龙岩金叶复烤有限责任公司 | 一种烟叶配方打叶方法 |
CN105268656A (zh) * | 2015-10-29 | 2016-01-27 | 宁夏大学 | 电磁式果品快速分级装置 |
CN106248591A (zh) * | 2016-08-10 | 2016-12-21 | 中国农业科学院烟草研究所 | 一种烟叶成熟度区分用器具及其区分方法 |
CN106343607A (zh) * | 2016-11-04 | 2017-01-25 | 郑州大学 | 一种基于fpga的烟叶分级方法和装置 |
CN106418635A (zh) * | 2015-08-12 | 2017-02-22 | 福建武夷烟叶有限公司 | 降低打叶复烤烟碱变异系数的设备及工艺 |
CN106579537A (zh) * | 2017-01-20 | 2017-04-26 | 刘太明 | 一种烟叶智能分级拣选方法及装置 |
CN107543795A (zh) * | 2017-09-20 | 2018-01-05 | 中国烟草总公司郑州烟草研究院 | 一种烤烟产地的判别方法 |
US9870505B2 (en) | 2012-11-19 | 2018-01-16 | Altria Client Services Llc | Hyperspectral imaging system for monitoring agricultural products during processing and manufacturing |
CN107589079A (zh) * | 2017-09-06 | 2018-01-16 | 安徽中烟工业有限责任公司 | 一种基于烟叶颜色检验评价打叶复烤片烟混合均匀性的方法 |
US10197504B2 (en) | 2016-10-10 | 2019-02-05 | Altria Client Services Llc | Method and system of detecting foreign materials within an agricultural product stream |
CN109846069A (zh) * | 2019-03-13 | 2019-06-07 | 河南中烟工业有限责任公司 | 以烟气特性为指标的浓香型烤烟不同尺寸片烟分类方法 |
US10512942B2 (en) * | 2017-10-30 | 2019-12-24 | Optisort, Llc | System and method for sorting objects |
CN111380812A (zh) * | 2020-02-24 | 2020-07-07 | 红塔烟草(集团)有限责任公司 | 一种快速鉴别烤烟硃砂烟叶的方法 |
CN112006318A (zh) * | 2020-08-26 | 2020-12-01 | 福建武夷烟叶有限公司 | 一种适用于不同程度含青含杂烟叶的打叶复烤加工工艺 |
CN114916696A (zh) * | 2022-05-18 | 2022-08-19 | 山东潍坊烟草有限公司 | 一种鲜烟叶等级及品质判定标准的建立方法 |
US11533920B2 (en) * | 2016-11-14 | 2022-12-27 | Marel Iceland Ehf | System and a method for processing meat pieces |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2713396A1 (de) * | 1977-03-24 | 1978-09-28 | Applied Photophysics Ltd | Verfahren und vorrichtung zur kennzeichnung oder identifizierung eines leuchtmaterial enthaltenden oder tragenden koerpers |
US4239118A (en) * | 1978-02-03 | 1980-12-16 | Geosource Inc. | Sorting apparatus having automatic nulling arrangement |
AU1365783A (en) * | 1982-04-30 | 1983-11-03 | Geosource Inc. | Oil shale sorter classification circuitry |
DE3437580C2 (de) * | 1983-10-28 | 1995-11-16 | Hauni Werke Koerber & Co Kg | Vorrichtung zum optischen Prüfen eines Zigarettenstrangs |
GB2151018B (en) * | 1983-12-06 | 1987-07-22 | Gunsons Sortex Ltd | Sorting machine and method |
JPS59155729A (ja) * | 1983-12-27 | 1984-09-04 | Satake Eng Co Ltd | 色彩選別機の異色粒放出装置 |
AT380814B (de) * | 1984-09-10 | 1986-07-10 | Andritz Ag Maschf | Sortiereinrichtung zum trennen von in zufallsverteilung anfallenden, nach farbe, helligkeitswert, groesse oder dergleichen verschiedenen partikeln |
JPS61216787A (ja) * | 1985-03-19 | 1986-09-26 | 株式会社 安西製作所 | 混入された異物を判定選別して除去をする機構 |
BG47531A1 (en) * | 1987-12-15 | 1990-08-15 | Vissh Inst Khranitelno Vkusova | Device for automatic sorting of fruits, vegetables and tuberiferous plants according to their quality |
JPH01162634U (de) * | 1989-02-27 | 1989-11-13 | ||
CN104226613B (zh) * | 2014-09-15 | 2017-01-25 | 河南科技大学 | 一种阻尼电磁式烟叶自动分拣机械手 |
CN112704259B (zh) * | 2020-12-11 | 2022-09-13 | 杭州安脉盛智能技术有限公司 | 一种密集烟叶识别的打叶质量评价方法及系统 |
CN114682524B (zh) * | 2020-12-31 | 2023-07-28 | 合肥美亚光电技术股份有限公司 | 一种信号校正方法、装置及分选设备 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3066797A (en) * | 1958-10-20 | 1962-12-04 | R W Gunson Seeds Ltd | Colour sorting machines |
US3373870A (en) * | 1966-07-08 | 1968-03-19 | American Tobacco Co | Cigar classification apparatus |
US3737239A (en) * | 1971-07-16 | 1973-06-05 | Hoffmann La Roche | Machine color recognition |
US3744919A (en) * | 1971-07-16 | 1973-07-10 | Hanscom G | Color measuring with memory |
US3750883A (en) * | 1972-05-03 | 1973-08-07 | Fmc Corp | Circuitry for sorting fruit according to color |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA949169A (en) * | 1971-05-20 | 1974-06-11 | Joseph R. Perkins (Iii) | Automatic grader and sorter using polychromatic light |
-
1973
- 1973-05-15 US US00360570A patent/US3854586A/en not_active Expired - Lifetime
-
1974
- 1974-02-08 CH CH178874A patent/CH577677A5/xx not_active IP Right Cessation
- 1974-04-01 DE DE2415752A patent/DE2415752C2/de not_active Expired
- 1974-04-10 GB GB1583874A patent/GB1460527A/en not_active Expired
- 1974-05-03 CA CA198,791A patent/CA998645A/en not_active Expired
- 1974-05-15 JP JP49053489A patent/JPS5743233B2/ja not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3066797A (en) * | 1958-10-20 | 1962-12-04 | R W Gunson Seeds Ltd | Colour sorting machines |
US3373870A (en) * | 1966-07-08 | 1968-03-19 | American Tobacco Co | Cigar classification apparatus |
US3737239A (en) * | 1971-07-16 | 1973-06-05 | Hoffmann La Roche | Machine color recognition |
US3744919A (en) * | 1971-07-16 | 1973-07-10 | Hanscom G | Color measuring with memory |
US3750883A (en) * | 1972-05-03 | 1973-08-07 | Fmc Corp | Circuitry for sorting fruit according to color |
Cited By (61)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4222731A (en) * | 1978-01-09 | 1980-09-16 | Leo Enrietti | Molding press for plastic materials |
US4634881A (en) * | 1982-11-09 | 1987-01-06 | Supernova Systems, Inc. | Apparatus for detecting impurities in translucent bodies |
US4609108A (en) * | 1984-01-27 | 1986-09-02 | Institute Po Technicheska Kibernetika I Robotika | Tobacco sorting method and apparatus |
DE3490661C2 (de) * | 1984-02-21 | 1992-02-13 | Aleksandr Zamotaev | Optisches Verfahren zum Fruchtsortieren nach Fruchtqualit{t und Vorrichtung zur Durchf}hrung dieses Verfahrens |
DE3428966A1 (de) * | 1984-08-06 | 1986-02-06 | Institut po Techničeska Kibernetika i Robotika, Sofia/Sofija | Verfahren und vorrichtung zum sortieren von tabakblaettern |
US4940850A (en) * | 1987-02-14 | 1990-07-10 | Satake Engineering Co., Ltd. | Color sorting apparatus |
US5265732A (en) * | 1991-05-21 | 1993-11-30 | Esm International, Inc. | Variable background for a sorting machine |
EP1173292A4 (de) * | 1999-03-29 | 2004-09-29 | Src Vision Inc | Mehrbandspektrales sortierungssystem für leichte gegenstände |
EP1173292A1 (de) * | 1999-03-29 | 2002-01-23 | SRC Vision, Inc. | Mehrbandspektrales sortierungssystem für leichte gegenstände |
US6646218B1 (en) * | 1999-03-29 | 2003-11-11 | Key Technology, Inc. | Multi-band spectral sorting system for light-weight articles |
WO2000058035A1 (en) * | 1999-03-29 | 2000-10-05 | Src Vision, Inc. | Multi-band spectral sorting system for light-weight articles |
US20050199252A1 (en) * | 2004-03-15 | 2005-09-15 | Universal Leaf Tobacco Company, Inc. | Apparatus and method for scanning and sorting tobacco leaves |
US7383840B2 (en) | 2004-03-15 | 2008-06-10 | Universal Leaf Tobacco Company, Inc. | Apparatus for scanning and sorting tobacco leaves |
EP2107361A1 (de) * | 2008-04-02 | 2009-10-07 | Unilever PLC | Verfahren und Vorrichtung zur Analyse von Pflanzenmaterial |
US20110067714A1 (en) * | 2009-09-18 | 2011-03-24 | Harry Drewes | Apparatus and method for post-threshing inspection and sorting of tobacco lamina |
US8281931B2 (en) | 2009-09-18 | 2012-10-09 | Key Technology, Inc. | Apparatus and method for post-threshing inspection and sorting of tobacco lamina |
US11400027B2 (en) | 2010-03-19 | 2022-08-02 | Incisive Technologies Pty Ltd | Kit and method for detecting porous dental hydroxyapatite |
US20130065250A1 (en) * | 2010-03-19 | 2013-03-14 | Michael James Hubbard | Kit and Method for Detecting Porous Dental Hydroxyapatite |
US10434037B2 (en) | 2010-03-19 | 2019-10-08 | Incisive Technologies Pty Ltd | Kit and method for detecting porous dental hydroxyapatite |
CN102871211A (zh) * | 2012-09-13 | 2013-01-16 | 红云红河烟草(集团)有限责任公司 | 一种提高复烤成品片烟中片率的方法 |
US11250261B2 (en) | 2012-11-19 | 2022-02-15 | Altria Client Services Llc | Hyperspectral imaging system for monitoring agricultural products during processing and manufacturing |
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US11946806B2 (en) | 2012-11-19 | 2024-04-02 | Altria Client Services Llc | On-line oil and foreign matter detection system and method employing hyperspectral imaging |
US11946807B2 (en) | 2012-11-19 | 2024-04-02 | Altria Client Services Llc | Hyperspectral imaging system for monitoring agricultural products during processing and manufacturing |
US11222203B2 (en) | 2012-11-19 | 2022-01-11 | Altria Client Services Llc | On-line oil and foreign matter detection system and method employing hyperspectral imaging |
US9996745B2 (en) | 2012-11-19 | 2018-06-12 | Altria Client Services Llc | Blending of agricultural products via hyperspectral imaging and analysis |
US20180121706A1 (en) | 2012-11-19 | 2018-05-03 | Altria Client Services Llc | On-line oil and foreign matter detection system and method employing hyperspectral imaging |
US10592745B2 (en) | 2012-11-19 | 2020-03-17 | Altria Client Services Llc | On-line oil and foreign matter detection system and method employing hyperspectral imaging |
US9870505B2 (en) | 2012-11-19 | 2018-01-16 | Altria Client Services Llc | Hyperspectral imaging system for monitoring agricultural products during processing and manufacturing |
US11250259B2 (en) | 2012-11-19 | 2022-02-15 | Altria Client Services Llc | Blending of agricultural products via hyperspectral imaging and analysis |
CN103211292A (zh) * | 2013-03-20 | 2013-07-24 | 湖南中烟工业有限责任公司 | 一种片烟分段精选设备及方法 |
CN103844344A (zh) * | 2014-03-11 | 2014-06-11 | 上海烟草集团有限责任公司 | 一种调控不同批次卷烟烟丝质量均匀性的方法及其应用 |
CN103844344B (zh) * | 2014-03-11 | 2016-02-24 | 上海烟草集团有限责任公司 | 一种调控不同批次卷烟烟丝质量均匀性的方法及其应用 |
CN103976468A (zh) * | 2014-04-30 | 2014-08-13 | 河南科技大学 | 一种烟叶分级方法 |
CN104585856A (zh) * | 2014-12-18 | 2015-05-06 | 红云红河烟草(集团)有限责任公司 | 一种基于原料品质动态变化的烟叶分组方法 |
CN104783320A (zh) * | 2015-02-17 | 2015-07-22 | 福建省龙岩金叶复烤有限责任公司 | 一种烟叶配方打叶方法 |
CN106418635A (zh) * | 2015-08-12 | 2017-02-22 | 福建武夷烟叶有限公司 | 降低打叶复烤烟碱变异系数的设备及工艺 |
CN105268656B (zh) * | 2015-10-29 | 2017-10-13 | 宁夏大学 | 电磁式果品快速分级装置 |
CN105268656A (zh) * | 2015-10-29 | 2016-01-27 | 宁夏大学 | 电磁式果品快速分级装置 |
CN106248591A (zh) * | 2016-08-10 | 2016-12-21 | 中国农业科学院烟草研究所 | 一种烟叶成熟度区分用器具及其区分方法 |
CN106248591B (zh) * | 2016-08-10 | 2022-03-04 | 中国农业科学院烟草研究所 | 一种烟叶成熟度区分用器具及其区分方法 |
US10527558B2 (en) | 2016-10-10 | 2020-01-07 | Altria Client Services Llc | Method and system of detecting foreign materials within an agricultural product stream |
US10197504B2 (en) | 2016-10-10 | 2019-02-05 | Altria Client Services Llc | Method and system of detecting foreign materials within an agricultural product stream |
CN106343607A (zh) * | 2016-11-04 | 2017-01-25 | 郑州大学 | 一种基于fpga的烟叶分级方法和装置 |
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CN112006318A (zh) * | 2020-08-26 | 2020-12-01 | 福建武夷烟叶有限公司 | 一种适用于不同程度含青含杂烟叶的打叶复烤加工工艺 |
CN112006318B (zh) * | 2020-08-26 | 2022-04-05 | 福建武夷烟叶有限公司 | 一种适用于不同程度含青含杂烟叶的打叶复烤加工工艺 |
CN114916696A (zh) * | 2022-05-18 | 2022-08-19 | 山东潍坊烟草有限公司 | 一种鲜烟叶等级及品质判定标准的建立方法 |
Also Published As
Publication number | Publication date |
---|---|
JPS5018700A (de) | 1975-02-27 |
CH577677A5 (de) | 1976-07-15 |
CA998645A (en) | 1976-10-19 |
DE2415752C2 (de) | 1984-02-02 |
GB1460527A (en) | 1977-01-06 |
JPS5743233B2 (de) | 1982-09-13 |
DE2415752A1 (de) | 1974-12-05 |
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