Abstract: A method for helmet construction by applying vacuum and fluid-pressure technologies is disclosed. Different types and sizes of exterior and interior helmet shells are press-formed from general engineering plastics. Conventional adhesive is applied on the inside surface of the exterior shell for fastening the interior and exterior shells together to form an integral shell unit. The shell unit is set on the base of a vacuuming apparatus moulded to adapt and to receive the inside surface contour of the interior shell. The vacuuming apparatus and the shell unit setting thereon are placed inside a conventional plastic film bag for vacuuming clear of any air pockets in the space between the two shell layers. The vacuumed film bag containing the vacuuming apparatus and the shell unit is then submerged under heated fluid contained in an airtight and pressure-resistant vessel. Pressure is subsequently applied to the vessel to further pressurize and complete the fastening process of the interior and exterior shells.

Abstract: A device and method for graphic transfers for packaging and other 3-D items. In the method, a sheet of plastic material is printed with graphical indicia that have been modified to compensate for distortions that take place when the plastic sheet is molded. When the plastic sheet with the modified graphical indicia is molded into the 3-D item, the graphical indicia will be returned to its unaltered form. The machine has upper and lower mold bodies that when brought together to a closed position will tightly seal a plastic sheet therebetween to define an upper airspace and a lower airspace. The machine has a heating source and a mold in the lower mold body. The machine is usable to mold plastics sheets bearing modified graphical indicia into 3-D items where the graphical indicia is returned to its unmodified state.

Abstract: A process is disclosed for non-toxic transfer-printing of images onto a surface of a workpiece. The patterns or characters to be printed are first formed on a transferring medium using a non-toxic ink, and then the non-toxic ink patterns or characters are separated form the transferring medium with water and placed on the workpiece, which is then fixed so that the patterns or characters are transferred onto the workpiece surface firmly.

Abstract: A process for full-automatic and synchronous quick thermoprinting of stereoscopic color film and apparatus adopting the process uses the internationally accepted nontoxic oil ink to design patterns on a transfer medium, which medium is in turn absorbed by a special thin film so as to be attached to a printing stock, whereupon the thus prepared printing stock is put into the apparatus. By gas pressure a pressure column of an inclined surface is pushed downward so as to contact and press a sliding mold jig of the inclined surface to synchronously move toward the center, so that each outer mold thermocompresses onto the outer surface of the printing stock from upper, left, right, front and rear directions simultaneously. After a predetermined period at predetermined temperature, the mold automatically returns to its original position. The disadvantages of manual operation which is of lower efficiency and unstable quality are thus overcome.

Abstract: The application discloses a process for full-automatic and synchronous quick thermoprinting of stereoscopic color film and apparatus adopting the process, which uses the internationally recognized nontoxic oil ink to design patters on a transfer media, which media is in turn absorbed by a special thin film so as to be attached to a printing stock, and then it is put into the apparatus of the present invention. A gas pressure means pushes a pressure column of an inclined surface downward so as to contact and press a sliding mold jig of the inclined surface to synchronously move toward the center, so that each outer mold thermocompresses onto the outer surface of the printing stock form upper, left, right, front and rear directions simultaneously. After predetermined period at predetermined temperature, the mold automatically returns to its original position. The present invention overcomes the disadvantages of the manual operation which is of lower efficiency and unstable quality.