CITY MILK PLANTS! CONSTRUCTION AND ARRANGEMENT. 13 



outside, the truck can be quickly unloaded and another driven up 

 immediately and unloaded. Usually two or more trucks can be un- 

 loaded at one time, which is not the case if they are unloaded within 

 the plant. 



Some plants with platforms outside greatly expedite the unloading 

 and dumping of the milk by the use of roller conveyers. The plat- 

 form should be covered to protect the workmen from the weather. 

 The cans as they are removed from the truck are placed on the con- 

 veyers, on which they are carried to the dump or weigh tank. The 

 cans may then be rolled on more conveyers to the can washer and 

 thence to the can racks or back to the trucks. If the milk is received 

 in this way the receiving room can be kept cleaner and the work can 

 be done much more economically than if the trucks are driven into 

 the building. 



The unloading platform should be as close as possible to the re- 

 ceiving room and should be level with the floor of the truck, so that 

 the cans of milk may be readily rolled from the truck. By having 

 the dump tank close to the receiving platform and also lowered to 

 the level of the floor, milk may be handled rapidly and with few 

 men. It is desirable, however, to have the receiving room well in- 

 closed and far enough from the street to reduce to a minimum the 

 chances of contamination of the milk from that source. At many 

 plants the platform can be most advantageously placed at some dis- 

 tance from the receiving room, even though more time and men may 

 be required to receive and dump the milk. At such plants, much time 

 and labor can usually be saved by the use of conveyers. 



The plant should be so arranged that there will be no confusion of 

 the milk trucks with the delivery wagons. A convenient arrangement 

 is to have the receiving platform on one side of the building and the 

 loading platform for delivery wagons on the other side. 



In Table 1 a comparison is made of a few plants to illustrate three 

 methods of arrangement for receiving the milk. 



Table 1. — Economy of various arrangements of plants for receiving and 



dumping milk. 



Type of plant. 



Xumber 



of 

 plants. 



Average 

 number 

 of cans 

 received 



per 

 plant. 



Average 

 number 

 of men 



per 

 plant. 



Average 



time 



per 



plant. 



hours of 



labor per 



plant " 



Average 

 hours of 



labor 

 per 100 



cans. 



Average 

 time 



per 100 

 cans. 



Average 



cans 

 handled 

 per hour. 



Truck unloaded inside plant 

 and milk either dumped at 

 ground floor or sent up- 

 stairs on elevators (no plat- 

 forms used) 



Trucks unloaded at platform 

 and milk sent to receiving 

 room on conveyers 



Trucks unloaded at platform 

 and milk dumped in tank 

 near by 



207 

 643 

 500 



3.3 



4 

 2.5 



Hours. 

 2.5 



8.3 

 19.0 

 8.7 



4.0 

 2.9 



Hours. 

 1.2 



82.6 

 121 



154 



i "Man hours. 



