US Patent 8353429 Dispensing apparatus

A dispensing apparatus includes a support frame, a receiving tube, a dispenser, a slide rail, a screw rod, a driving assembly, and a push piston. The receiving tube is fixed to the support frame. The receiving tube defines a tube cavity for receiving glue materials, and an output tube communicating with the receiving tube. The dispenser is connected to the receiving tube. A slide rail is fixed on the support frame, and a sliding member is slidably connected to the slide rail. A screw rod engages with the sliding member. A driving assembly drives a screw rod to move. A push piston is fixed on the sliding member, and is partially received in the receiving tube for pushing glue materials to flow to the dispenser.