Abstract: Provided is a character-printing vacuum sealer comprising a base and a cover, the cover being movably hinged to a rear edge of the base, the base being configured with a vacuum pump a control circuit board, and a power cord, wherein the vacuum pump is electrically connected to the control circuit board; an upper vacuum chamber and a lower vacuum chamber, wherein the upper vacuum chamber corresponding to the lower vacuum chamber forms a heat-seal area when the cover is closed against the base, wherein the upper and lower vacuum chambers are each configured with a sealing gasket at their peripheries; a heating sheet assembly electrically connected to the control circuit board being positioned on a front edge of the base opposite to the rear edge; a heat-seal strip being positioned on a front edge of the cover opposite to the rear edge.

Abstract: Provided is a character-printing vacuum sealer comprising a base and a cover, the cover being movably hinged to a rear edge of the base, the base being configured with a vacuum pump a control circuit board, and a power cord, wherein the vacuum pump is electrically connected to the control circuit board; an upper vacuum chamber and a lower vacuum chamber, wherein the upper vacuum chamber corresponding to the lower vacuum chamber forms a heat-seal area when the cover is closed against the base, wherein the upper and lower vacuum chambers are each configured with a sealing gasket at their peripheries; a heating sheet assembly electrically connected to the control circuit board being positioned on a front edge of the base opposite to the rear edge; a heat-seal strip being positioned on a front edge of the cover opposite to the rear edge.

Abstract: A device for testing pressure of keys of a full keyboard includes a variable-pitch test module mechanism. The variable-pitch test module mechanism includes multiple modules mounted on a base plate and probe modules provided corresponding to the variable-pitch test modules one by one; the variable-pitch test module includes a first driving device and a second driving device, the probe module is mounted on the second driving device, the second driving device is provided on the first driving device, the first driving device is configured to adjust a position of the probe module in an X direction, and the second driving device is configured to adjust a position of the probe module in a Y direction; and the probe module includes a lifting device and a probe for testing. The lifting device is connected to the probe and is configured to adjust a position of the probe in a Z direction.