Burns Coal Roaster with Brickwork Setting

The front of the machine shown has a cast-iron plate having brackets which support the cylinder front bearing, and double fire doors below for the furnace and the ash pit. The movable part of the roaster is hidden by the front head, a heavy casting which stands still except when moved by hand through a half-turn for feeding and discharging.

The cylinder is driven by gears at the back, revolving constantly at uniform speed. The inside of the cylinder is arranged with reverse-spiral flanges which mix the coffee perfectly and make uneven roasting impossible; and they discharge promptly every grain of coffee when the front-head opening is turned to the lower position. The roaster is generally operated with coal fuel, but can be used with gas by installing a suitable burner under the cylinder.

Open Perforated Cylinder with Flexible Back Head

Cost Card for Roasters
Showing the value added to the cost of green coffee by roasting
By A.C. Aborn
Basis: 16 percent Shrinkage.
3⁄4 cent a pound for Roasting.
G = Cost Green, Cents per Lb.
R = Cost Roasted, Cents per Lb.
GRGRGRGR
5 6.851215.181923.512631.85
51⁄8 6.99121⁄815.33191⁄823.66261⁄831.99
51⁄4 7.14121⁄415.48191⁄423.81261⁄432.14
53⁄8 7.29123⁄815.63193⁄823.96263⁄832.29
51⁄2 7.44121⁄215.77191⁄224.11261⁄232.44
55⁄8 7.59125⁄815.92195⁄824.26265⁄832.59
53⁄4 7.74123⁄416.07193⁄424.40263⁄432.74
57⁄8 7.89127⁄816.22197⁄824.55267⁄832.89
6 8.041316.372024.702733.04
61⁄8 8.19131⁄816.52201⁄824.85271⁄833.18
61⁄4 8.33131⁄416.67201⁄425.00271⁄433.33
63⁄8 8.48133⁄816.82203⁄825.15273⁄833.48
61⁄2 8.63131⁄216.97201⁄225.30271⁄233.63
65⁄8 8.78135⁄817.11205⁄825.45275⁄833.78
63⁄4 8.93133⁄417.26203⁄425.60273⁄433.93
67⁄8 9.08137⁄817.41207⁄825.75277⁄834.08
7 9.231417.562125.892834.23
71⁄8 9.37141⁄817.71211⁄826.04281⁄834.38
71⁄4 9.52141⁄417.86211⁄426.19281⁄434.52
73⁄8 9.67143⁄818.01213⁄826.34283⁄834.67
71⁄2 9.82141⁄218.15211⁄226.49281⁄234.82
75⁄8 9.97145⁄818.30215⁄826.64285⁄834.97
73⁄410.12143⁄418.45213⁄426.79283⁄435.12
77⁄810.27147⁄818.60217⁄826.93287⁄835.27
810.421518.752227.082935.42
81⁄810.57151⁄818.90221⁄827.23291⁄835.57
81⁄410.71151⁄419.05221⁄427.38291⁄435.71
83⁄810.86153⁄819.20223⁄827.53293⁄835.86
81⁄211.01151⁄219.35221⁄227.68291⁄236.01
85⁄811.16155⁄819.49225⁄827.83295⁄836.16
83⁄411.31153⁄419.64223⁄427.98293⁄436.31
87⁄811.46157⁄819.79227⁄828.13297⁄836.46
911.611619.942328.273036.61
91⁄811.76161⁄820.09231⁄828.42301⁄836.76
91⁄411.90161⁄420.24231⁄428.57301⁄436.90
93⁄812.05163⁄820.39233⁄828.72303⁄837.05
91⁄212.20161⁄220.54231⁄228.87301⁄237.20
95⁄812.35165⁄820.68235⁄829.02305⁄837.35
93⁄412.50163⁄420.83233⁄429.17303⁄437.50
97⁄812.65167⁄820.98237⁄829.32307⁄837.65
1012.801721.132429.463137.80
101⁄812.95171⁄821.28241⁄829.61311⁄837.95
101⁄413.10171⁄421.43241⁄429.76311⁄438.10
103⁄813.24173⁄821.58243⁄829.91313⁄838.24
101⁄213.39171⁄221.73241⁄230.06311⁄238.39
105⁄813.54175⁄821.87245⁄830.21315⁄838.54
103⁄413.69173⁄422.02243⁄430.36313⁄438.69
107⁄813.84177⁄822.17247⁄830.51317⁄838.84
1113.991822.322530.653238.90
111⁄814.14181⁄822.47251⁄830.80321⁄839.14
111⁄414.29181⁄422.62251⁄430.95321⁄439.29
113⁄814.43183⁄822.77253⁄831.10323⁄839.43
111⁄214.58181⁄222.92251⁄231.25321⁄239.58
115⁄814.73185⁄823.07255⁄831.40325⁄839.73
113⁄414.88183⁄423.21253⁄431.55323⁄439.88
117⁄815.03187⁄823.36257⁄831.70327⁄840.03

FACTORY PREPARATION
A GREEN COFFEE SHRINKAGE TABLE
Showing shrinkage in roasting of raw coffee in quantities from sixty pounds up to
three hundred pounds, and at six different shrinkage percentages
Compiled by R.C. Wilhelm, New York
RAW12%13%14%15%16%17%RAW12%13%14%15%16%17%RAW12%13%14%15%16%17%
60 523⁄4 521⁄4 511⁄2 51 501⁄2 493⁄41401231⁄41213⁄41201⁄21191171⁄21161⁄42201931⁄21911⁄21891⁄41871843⁄41821⁄2
61 533⁄4 53 521⁄2 513⁄4 511⁄4 503⁄41411241223⁄41211⁄41193⁄41181⁄21172211941⁄21921⁄41901873⁄41853⁄41831⁄2
62 541⁄2 54 531⁄4 521⁄4 52 511⁄21421251231⁄21221203⁄41191⁄41173⁄42221951⁄41931⁄41911883⁄41861⁄21841⁄4
63 551⁄2 543⁄4 54 531⁄2 53 521⁄41431253⁄41241⁄21231211⁄21201183⁄42231961⁄41941913⁄41891⁄21871⁄4185
64 561⁄4 553⁄4 55 541⁄2 533⁄4 531441263⁄41251⁄41233⁄41221⁄21211191⁄22241971951923⁄41901⁄21881⁄4186
65 571⁄4 561⁄2 56 551⁄4 541⁄2 541451271⁄21261⁄41243⁄41231⁄41213⁄41201⁄42251981953⁄41931⁄21911⁄41891863⁄4
66 58 571⁄2 563⁄4 56 551⁄2 543⁄41461281⁄21271251⁄21241223⁄41211⁄42261991961⁄21941⁄41921893⁄41871⁄2
67 59 581⁄4 573⁄4 57 561⁄4 551⁄21471291⁄41281261⁄21251231⁄21222271993⁄41971⁄21951⁄41931903⁄41881⁄2
68 593⁄4 591⁄4 581⁄2 573⁄4 57 561⁄21481301⁄41283⁄41271⁄41253⁄41241⁄41223⁄42282003⁄41981⁄41961933⁄41911⁄21891⁄4
69 603⁄4 60 591⁄4 583⁄4 58 571⁄41491311293⁄41281⁄41263⁄41251⁄41233⁄42292011⁄21991⁄41971943⁄41921⁄4190
70 611⁄2 61 601⁄4 591⁄2 583⁄4 581501321301⁄21291271⁄21261241⁄22302021⁄22001981951⁄21931⁄2191
71 621⁄2 613⁄4 61 601⁄4 593⁄4 591511331311⁄41293⁄41281⁄41263⁄41251⁄42312031⁄42011983⁄41961⁄21941⁄4192
72 631⁄4 623⁄4 62 61 601⁄2 593⁄41521333⁄41321⁄41303⁄41291⁄41273⁄41261⁄42322042021991⁄21971951921⁄2
73 641⁄4 631⁄2 623⁄4 62 611⁄4 601⁄21531343⁄41331311⁄21301281⁄21272332052023⁄42001⁄41981953⁄41931⁄4
74 65 641⁄2 633⁄4 63 621⁄4 611⁄21541351⁄21341321⁄21311291⁄41273⁄42342062031⁄22011991961⁄2194
75 66 651⁄4 641⁄2 633⁄4 63 621⁄41551361⁄21343⁄41331⁄41313⁄41301⁄41283⁄42352063⁄42041⁄22021993⁄41971⁄2195
76 67 66 651⁄4 641⁄2 633⁄4 631561371⁄41353⁄41341⁄41321⁄21311291⁄22362071⁄22052032001⁄2198196
77 673⁄4 67 661⁄4 651⁄2 643⁄4 641571381⁄41361⁄21351331⁄21321301⁄42372081⁄22061⁄42033⁄42011⁄21991963⁄4
78 683⁄4 68 67 661⁄4 651⁄2 643⁄41581391371⁄21361341⁄41323⁄41311⁄42382091⁄22072041⁄22021⁄42001971⁄2
79 691⁄2 683⁄4 68 671⁄4 661⁄2 653⁄41591401381⁄41363⁄41351⁄41331⁄21322392101⁄42082051⁄22031⁄42003⁄41981⁄4
80 701⁄2 693⁄4 683⁄4 68 671⁄4 661⁄21601403⁄41391⁄41371⁄21361341⁄21323⁄42402112083⁄42061⁄42042011⁄2199
81 711⁄4 701⁄2 693⁄4 69 68 671⁄41611413⁄41401381⁄21363⁄41351⁄41333⁄42412122093⁄42071⁄42043⁄42021⁄2200
82 721⁄4 711⁄2 701⁄2 693⁄4 69 681621421⁄21411391⁄41373⁄41361341⁄22422132101⁄22082053⁄4203201
83 73 721⁄4 711⁄2 701⁄2 693⁄4 691631431⁄21413⁄41401⁄41381⁄21371351⁄42432133⁄42111⁄22092061⁄22042013⁄4
84 74 731⁄4 721⁄4 711⁄2 701⁄2 693⁄41641441⁄41423⁄41411391⁄21373⁄41362442143⁄42121⁄42102071⁄42052021⁄2
85 743⁄4 74 731⁄4 721⁄4 711⁄4 701⁄21651451⁄41431⁄21421401⁄41381⁄21372452151⁄22132103⁄42081⁄42053⁄42031⁄4
86 753⁄4 743⁄4 74 731⁄4 721⁄4 711⁄41661461441⁄21423⁄41411391⁄21373⁄42462161⁄22142111⁄22092061⁄2204
87 761⁄2 753⁄4 75 74 731⁄4 721⁄41671471451⁄41431⁄21421401⁄41381⁄22472171⁄42152121⁄22102071⁄2205
88 771⁄2 761⁄2 753⁄4 743⁄4 733⁄4 731681473⁄41461⁄41441⁄21423⁄41411391⁄2248218216213211208206
89 781⁄2 771⁄2 761⁄2 753⁄4 743⁄4 741691483⁄41471451⁄41433⁄41421401⁄42492192163⁄42141⁄22111⁄22091⁄4207
90 791⁄4 781⁄4 771⁄2 761⁄2 753⁄4 751701491⁄21481461⁄41441⁄21421⁄41412502202171⁄22152121⁄22102071⁄2
91 801⁄2 791⁄4 781⁄4 771⁄2 761⁄2 751⁄21711501⁄21483⁄41471451⁄41433⁄41422512212181⁄42153⁄42131⁄42103⁄42081⁄4
92 81 80 791⁄4 781⁄4 771⁄4 761⁄21721511⁄41493⁄41481461⁄41441⁄21423⁄42522222192163⁄4214212209
93 82 81 80 79 781⁄4 771⁄41731521⁄41501⁄21483⁄41471451⁄41431⁄22532221⁄22202171⁄22152121⁄2210
94 823⁄4 813⁄4 803⁄4 80 79 781741531511⁄21493⁄41481461⁄41441⁄22542231⁄22212181⁄22162131⁄4211
95 833⁄4 823⁄4 813⁄4 803⁄4 793⁄4 791751541521⁄41501⁄21483⁄41471451⁄42552241⁄42222193⁄42163⁄42141⁄42111⁄2
96 841⁄2 831⁄2 821⁄2 813⁄4 803⁄4 793⁄41761551531511⁄41491⁄21473⁄4146256225223220218215212
97 851⁄2 841⁄2 831⁄2 821⁄2 811⁄2 801⁄21771553⁄41541521⁄41501⁄21483⁄41472572262233⁄42212183⁄4216213
98 861⁄4 851⁄4 841⁄4 831⁄4 821⁄2 811⁄21781563⁄41543⁄41531511⁄41491⁄21473⁄42582272241⁄22222191⁄22163⁄4214
99 871⁄4 861⁄4 851⁄4 841⁄4 831⁄4 821⁄41791571⁄21553⁄41541521⁄41501⁄41481⁄22592282251⁄42223⁄42201⁄42171⁄2215
100 88 87 86 85 84 831801581⁄21561⁄21543⁄41531511⁄41491⁄2260229226224221218216
101 89 871⁄2 861⁄2 851⁄2 841⁄2 831⁄21811591⁄41571⁄21553⁄41533⁄41521501⁄42612293⁄42272252222192163⁄4
102 893⁄4 883⁄4 873⁄4 863⁄4 853⁄4 843⁄41821601⁄41581⁄41561⁄21543⁄41531512622301⁄22282251⁄22223⁄42202171⁄2
103 903⁄4 893⁄4 883⁄4 871⁄2 861⁄2 851⁄21831611591⁄41571⁄21551⁄21533⁄41522632311⁄22292261⁄42231⁄22212181⁄4
104 911⁄2 901⁄2 891⁄2 881⁄2 871⁄2 861⁄21841621601581⁄41561⁄21541⁄21523⁄4264232230227224222219
105 921⁄2 911⁄2 901⁄4 891⁄4 881⁄4 871⁄41851623⁄41611591571⁄41551⁄21531⁄22652332303⁄42282252223⁄4220
106 931⁄4 921⁄4 911⁄4 901⁄4 89 881861633⁄41613⁄41601581561⁄41541⁄22662342311⁄22283⁄42262231⁄22203⁄4
107 941⁄4 931⁄4 92 91 90 883⁄41871641⁄21623⁄41603⁄41591571551⁄42672352321⁄42291⁄22272241⁄42211⁄2
108 95 94 93 913⁄4 903⁄4 893⁄41881651⁄21631⁄21613⁄41601581562682362332301⁄2228225222
109 96 95 933⁄4 923⁄4 911⁄2 901⁄21891661⁄41641⁄21621⁄21603⁄41563⁄41563⁄42692363⁄42342311⁄42281⁄22262231⁄4
110 963⁄4 953⁄4 943⁄4 931⁄2 921⁄2 913⁄41901671⁄41651⁄41631⁄21611⁄21591⁄21573⁄42702371⁄22352322291⁄22263⁄4224
111 973⁄4 963⁄4 951⁄2 941⁄2 931⁄4 921⁄41911681661⁄41641⁄41621⁄41601⁄21581⁄22712381⁄22353⁄42332301⁄42271⁄2225
112 981⁄2 971⁄2 961⁄2 951⁄4 941⁄4 931921691671651631⁄41611⁄41591⁄4272239237234231228226
113 991⁄2 981⁄4 971⁄4 96 95 933⁄41931693⁄41681661641621601⁄42732402373⁄42343⁄42322292263⁄4
1141001⁄2 991⁄4 98 97 953⁄4 943⁄41941703⁄41683⁄41663⁄41651631612742412381⁄22351⁄22332302271⁄2
1151011⁄41001⁄2 99 973⁄4 963⁄4 951⁄21951711⁄21693⁄41673⁄41653⁄41633⁄41613⁄42752422391⁄42361⁄22333⁄42312281⁄4
116102101 993⁄4 981⁄2 971⁄2 961⁄41961721⁄21701⁄21681⁄21661⁄21643⁄41623⁄42762432402371⁄42341⁄2232229
1171031013⁄41001⁄2 991⁄2 981⁄4 971971731⁄41711⁄21691⁄21671⁄21651⁄21631⁄22772433⁄42412381⁄42351⁄22323⁄4230
1181033⁄41021⁄21011⁄21001⁄4 99 981981741⁄41721⁄41701⁄41681⁄41661⁄41641⁄42782441⁄22422392361⁄22331⁄22303⁄4
1191043⁄41031⁄21021⁄4101100 983⁄41991751731⁄41711⁄41691⁄41671⁄41651⁄42792451⁄22432402372341⁄22311⁄2
1201051⁄21041⁄2103102101 991⁄22001761741721701681662802461⁄22433⁄42412382351⁄42321⁄2
1211061⁄21051⁄41041023⁄41011⁄21001⁄22011771743⁄41731703⁄41683⁄41663⁄42812471⁄42441⁄22413⁄42383⁄42362331⁄4
1221071⁄21061051031⁄21021⁄21011⁄22021773⁄41753⁄41733⁄41713⁄41693⁄41673⁄42822482451⁄22421⁄22391⁄2237234
1231081⁄41071053⁄41041⁄21031⁄41022031783⁄41761⁄21741⁄21721⁄21701⁄21681⁄22832492461⁄42431⁄42401⁄22373⁄4235
1241091081061⁄21051⁄21041032041791⁄21771⁄21751⁄21731⁄21711⁄41691⁄42842502472442411⁄22381⁄22353⁄4
1251101083⁄41071⁄21061⁄41051033⁄42051801⁄21781⁄41761⁄41741⁄41721⁄41701⁄42852503⁄42482452421⁄42391⁄42361⁄2
1261111091⁄21081071061041⁄22061811⁄41791⁄41771⁄41751731712862511⁄22492462432402371⁄2
1271113⁄41101⁄21091⁄41081063⁄41051⁄22071821⁄41801781761741713⁄42872521⁄22493⁄42463⁄42442412381⁄4
1281121⁄21111⁄21101091071⁄21062081831811791763⁄41743⁄41723⁄42882531⁄22501⁄22471⁄2245242239
1291131⁄21121⁄41111093⁄41081⁄41072091841813⁄41793⁄41773⁄41751⁄21731⁄22892541⁄42511⁄22481⁄22453⁄42423⁄42393⁄4
1301141⁄21131121101⁄21091082101843⁄41823⁄41801⁄21781⁄21761⁄21741⁄42902552521⁄22491⁄22461⁄22431⁄22403⁄4
1311151⁄41141123⁄41111⁄41101083⁄42111853⁄41831⁄21811⁄21791⁄41771⁄41751⁄42912562531⁄42501⁄42471⁄42441⁄22411⁄2
1321161151131⁄21121111091⁄22121861⁄21841⁄21821⁄41801⁄41781762922572542512482451⁄22421⁄2
1331171153⁄41141⁄41131113⁄41101⁄42131871⁄21851⁄41831⁄41811791763⁄42932573⁄42552522492461⁄42431⁄4
1341181161⁄21151⁄21141121⁄21112141881⁄41861⁄41841821793⁄41771⁄22942581⁄2256253250247244
1351183⁄41171⁄21161143⁄41131⁄41122151891⁄41871851823⁄41801⁄21781⁄22952591⁄22563⁄42533⁄42503⁄42473⁄42443⁄4
1361191⁄21181⁄21171151⁄21141132161901881853⁄41831⁄21811⁄21791⁄42962601⁄22571⁄22541⁄22511⁄22481⁄22451⁄2
1371201⁄21191⁄41173⁄41161⁄21151133⁄42171911883⁄41861⁄21841⁄21821⁄41802972611⁄42581⁄22551⁄22521⁄22491⁄22461⁄2
1381211⁄21201181⁄21171⁄21161141⁄22181913⁄41893⁄41871⁄21851⁄41831812982622591⁄42561⁄22531⁄22501⁄22471⁄2
1391221⁄41211191⁄21181⁄41163⁄41151⁄42191923⁄41901⁄21881⁄41861⁄41841813⁄42992632602571⁄42541⁄42511⁄42481⁄4