Patent ID: 6942792

Claim:
A mixer for a liquid chromatograph, the mixer comprising: a connected body including a plurality of plate materials connected together, said plurality of plate materials including first, second, and third plate materials, each of said plate materials defining a first liquid supply hole through which a first liquid flows, a second liquid supply hole through which a second liquid flows, and a liquid take-out hole through which a mixture of the first and second liquids flows out of the connected body, wherein said first liquid supply holes are in fluid communication with one another, said second liquid supply holes are in fluid communication with one another, and said liquid take-out holes are in fluid communication with one another; wherein said second plate material also defines a first flow passage that receives the first liquid from the said second plate material first liquid supply hole and a second flow passage that receives the second liquid from the second plate material second liquid supply hole; wherein said third plate material defines a mixing portion that receives the first liquid from the second plate material first flow passage and receives the second liquid from the second plate material second flow passage, whereby the first and second liquids mix with one another in said mixing portion and the mixture thereafter flows through the third plate material liquid take-out hole; and, wherein the first, second, and third plate material are superimposed on top of each other and wherein the flow passages are connected in parallel to each other.