Case packer/unpacker can handle different plastic cases and carton cases. They are available in double four-linkage type and translational type. Movement of four-linkage type is driven by motor with braking. The unique double four-linkage mechanism ensures accurate and smooth lifting and lowering of bottles. Movement of transltional type is driven by servo mtor with braking. Interlocked forward/backward and up/down movement ensures accurateand smooth lifting and lowering of bottles. Cases are positioned one by one to secure alignment of gripper head with bottle mouth.