Used Hartness International case packer Model 850. The machine was manufactured in 1991. This is an all stainless steel machine utilizing plastic tabletop chain. This is a dual head machine dropping containers into two cartons at a time. This machine has a mechanical trip mechanism rather than the air bag system. Hartness rebuilt the machine in mid 1996 at which time the air transfer was changed to a mechanical trip operation. The machine has not been put back into service since that time. Machine is designed to run at up to 25 cycles per minute (50 cases). Machine is currently set up with change parts to run 2 liter and 3 liter soda bottles. Hartness can convert the machine to continuous motion and has done so on many of the existing machines.