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A packaging machine for making substantially air-tight bags at high speed. The machine includes a film drive and pinch roll pair, a pair of film pull belts, and a pair of zipper drive rollers for pulling plastic film and zippered strip through the machine. The machine can produce recloseable bags wi

A packaging machine for making substantially air-tight bags at high speed. The machine includes a film drive and pinch roll pair, a pair of film pull belts, and a pair of zipper drive rollers for pulling plastic film and zippered strip through the machine. The machine can produce recloseable bags with zipperlocks by including zippered strips and a zipperlock applicator and feed and apparatus selectively releasing the tension from the zippered drive rollers.

대표청구항 ▼

A packaging machine for making substantially air-tight bags at high speed. The machine includes a film drive and pinch roll pair, a pair of film pull belts, and a pair of zipper drive rollers for pulling plastic film and zippered strip through the machine. The machine can produce recloseable bags wi

A packaging machine for making substantially air-tight bags at high speed. The machine includes a film drive and pinch roll pair, a pair of film pull belts, and a pair of zipper drive rollers for pulling plastic film and zippered strip through the machine. The machine can produce recloseable bags with zipperlocks by including zippered strips and a zipperlock applicator and feed and apparatus selectively releasing the tension from the zippered drive rollers. 1. A plow system for use with a vehicle, the vehicle having a hydraulic system for supplying hydraulic fluid under pressure from a hydraulic fluid reservoir to a hydraulic fluid outlet, wherein the hydraulic system is operable in an active mode to continuously supply hydraulic fluid under pressure to the hydraulic fluid outlet, said plow system comprising: a repositionable plow blade; a hydraulic actuator coupled to the plow blade; a hydraulic control system including a pressure head for supplying hydraulic fluid from the hydraulic fluid outlet to the hydraulic actuator to enable the hydraulic actuator to reposition the plow blade; and a bypass device for diverting hydraulic fluid away from the hydraulic actuator when the hydraulic system is operating in the active mode and the plow blade is not being repositioned, the bypass device including a valve wherein the valve is a normally open valve interposed between a hydraulic fluid inlet port and a hydraulic fluid outlet port of the pressure head. 2. The plow system according to claim 1, wherein the, hydraulic control system includes a pressure relief valve interposed between the hydraulic fluid inlet port and the hydraulic fluid outlet port for diverting hydraulic fluid to the hydraulic fluid reservoir in response to an overpressure condition. 3. A plow system for use with a vehicle, the vehicle having a hydraulic system for supplying hydraulic fluid under pressure from a hydraulic fluid reservoir to a hydraulic fluid outlet, wherein the hydraulic system is operable in an active mode to continuously supply hydraulic fluid under pressure to the hydraulic fluid outlet, said plow system comprising: a repositionable plow blade; a hydraulic actuator coupled to the plow blade; a hydraulic control system including a pressure head for supplying hydraulic fluid from the hydraulic fluid outlet to the hydraulic actuator to enable the hydraulic actuator to reposition the plow blade, wherein the hydraulic control system includes a four-way valve operable in a first mode to supply hydraulic fluid to the hydraulic actuator for extending a rod of the hydraulic actuator and operable in a second mode to supply hydraulic fluid to the hydraulic actuator for retracting the rod of the hydraulic actuator; and a bypass device for diverting hydraulic fluid away from the hydraulic actuator when the hydraulic system is operating in the active mode and the plow blade is not being repositioned. 4. A plow system for use with a vehicle, the vehicle having a hydraulic system for supplying hydraulic fluid under pressure from a hydraulic fluid reservoir to a hydraulic fluid outlet, wherein the hydraulic system is operable in an active mode to continuously supply hydraulic fluid under pressure to the hydraulic fluid outlet, said plow system comprising: a repositionable plow blade; a hydraulic actuator coupled to the plow blade; a hydraulic control system including a pressure head for supplying hydraulic fluid from the hydraulic fluid outlet to the hydraulic actuator to enable the hydraulic actuator to reposition the plow blade; a bypass device for diverting hydraulic fluid away from the hydraulic actuator when the hydraulic system is operating in the active mode and the plow blade is not being repositioned; and a wireless remote control transmitter which transmits coded radio frequency signals, and a wireless remote control receiver which receives the coded radio frequency signals and, in response to said coded frequency signals, provides an activating signal for causing the bypass device to allow hydraulic fluid to be supplied to the hydraulic actuator. 5. The plow system of claim 4, wherein the plow blade comprises a V-plow blade that includes first and second wing blades, and including a separate hydraulic actuator for each wing blade, and wherein the transmitter includes controls for selectively repositioning the first and second wing blades. 6. The plow system according to claim 5, w