Abstract: A vacuum sealing machine capable of locking cover automatically having upper cover limiting mechanism includes an upper lid, a lower seat, and an evacuation tank. The upper lid is hinged to the lower seat. The evacuation tank is located at the front of the vacuum sealing machine, and includes a lid-locking mechanism and an upper lid-limiting mechanism. The lid-locking mechanism is installed on the upper lid or the lower seat, and is connected to the upper lid-limiting mechanism. The upper lid-limiting mechanism includes a limiting lock plate and a limiting buckle portion. The limiting lock plate movably installed on the upper lid is fitted with the buckle of the limiting buckle portion installed on the lower seat; alternatively, the limiting lock plate movably installed on the lower seat is fitted with the buckle of the limiting buckle portion installed on the upper lid.

Abstract: The utility model discloses a vacuum sealing machine. The vacuum sealing machine comprises a base body, a bottom box, a bag opening heat sealing device, a vacuumizing device and a bag feeding induction mechanism, wherein the bottom box is arranged below the base body; the bag opening heat sealing device and a vacuumizing groove are correspondingly arranged on the connecting faces of the base body and the bottom box; the vacuumizing device communicates with the vacuumizing groove through a pipeline; and the bag feeding induction mechanism is arranged on the base body and positioned above the vacuumizing groove. According to the vacuum sealing machine, the bag feeding induction mechanism is arranged above the vacuumizing groove, so that detection of the bag feeding induction mechanism is stable and reliable, and the bag feeding induction mechanism is not prone to being damaged; and the vacuum sealing machine is simple in structure and low in cost.

Abstract: The utility model discloses a vacuum sealing machine driven by air pressure. The inner cavity of a seat body is provided with a lifting seat that slides in the vertical direction. A positive air pressure pushing mechanism for driving the lifting seat to move up and down is installed above the lifting seat. A bottom platform is arranged at the lower part of the inner cavity of the seat body. A bag opening heat sealing device is arranged on the bottom surface of the lifting seat or the top surface of the bottom platform. A control circuit is electrically connected to the bag opening heat sealing device. The lifting seat after moving downward when vacuuming or sealing is pressed against the bottom platform. The utility model has the advantages of simple structure, stable and reliable action, and lower cost.

Abstract: The present invention discloses a household vacuum sealer and a bag-cutting sealing method. In the household vacuum sealer, at least one cutter device is slidably mounted on the upper hood, a heat-seal bar and an evacuative groove are arranged at the front side of the upper portion of the lower hood, the upper hood or the lower hood is provided with a bag receiving chamber, a detachable automatic rollback shaft is rotatably mounted in the bag receiving chamber, the elastic rollback mechanism for automatically rolling the rollback shaft back and the elastic unidirectional locking mechanism for locking the automatic rollback shaft are mounted at the end portion of the automatic rollback shaft; the cutter device protrudes from a bottom surface of the upper hood, and the cutter moves at one side of the heat-seal bar or one side of the evacuative groove back and forth after the upper hood is locked onto the lower hood, for cutting off the bag pressed tightly between the upper hood and the lower hood.

Abstract: The present invention discloses an automatic paper feeding method for a paper shredder and a paper shredder, including a step of disposing paper, a step of pressing paper, a step of automatically feeding paper continuously, and a step of shredding paper. The paper sheets to be shredded entering the automatic paper feeding channel are superimposed partially; the paper disposing mechanism and the automatic paper feeding channel of the paper shredder are located at two sides of the paper rolling device respectively; the paper rolling device is located at least at the position above the lower end portion of the paper disposing area/paper sheets to be shredded. In the present invention, the paper sheets to be shredded conveyed to the automatic paper feeding channel are superimposed partially; during shredding, the shredding cutter shreds a plurality of paper sheets to be shredded at a time, with a higher feed speed and an increased shred speed. Besides, the automatic feed speed can be adjusted.