Replogle globe dating
The globe 10 includes a printed surface which defines land masses 28 and water areas 30.Portions of the globe are formed with a relief pattern or areas 32 which is associated with terrestrial features such as mountains or the like.A method of manufacturing a raised relief, illuminated globe includes printing a hemispherical map design on a flat vinyl plastic sheet, forming the vinyl plastic sheet into a substantially hemispherical shape, positioning the hemispherically formed sheet in a mold cavity, positioning a mold core on... Thus, an object of the present invention is to provide an improved globe with a relief surface and to provide a method for manufacturing a globe with a relief surface.A method of manufacturing a raised relief, illuminated globe includes printing a hemispherical map design on a flat vinyl plastic sheet, forming the vinyl plastic sheet into a substantially hemispherical shape, positioning the hemispherically formed sheet in a mold cavity, positioning a mold core on the back side of the sheet, injection molding a styrene backing for the hemispherical shaped sheet to conform the sheet with the mold cavity including relief areas defined in the cavity wall, and removing the molded hemisphere from the mold. A further object of this invention is to provide a method of manufacturing a globe with a relief surface that avoids the inaccuracies of conventional manufacturing techniques.Providing maps in relief has been known since at least 1908, see e.g., Patesson, U. In the detailed description which follows, reference will be made to the drawing comprised of the following figures: FIG. The assembled globe is hollow and formed from a material which is translucent to a light source positioned within the globe. Forming a thick printed sheet of material is an expensive and difficult task.
A support ring 24 is attached to the supports 20, 22 and, in turn, is affixed to a stand 26 in a conventional manner to support the globe 10.
Subsequently, the vinyl sheet 34 with the print 36 thereon, as exemplified by FIG. The resultant hemisphere 35 as exemplified by FIGS.
4 and 5, is rather flexible since it has been merely deformed from a planar shape to a hemispherical shape.
3 is an enlarged cross sectional view of the sheet of FIG. 4 is a side cross sectional view of the sheet of FIG. 6 is a side cross sectional view illustrating the manner in which the hemispherical sheet shown in FIGS. 9 is a side cross sectional view illustrating separation of the mold core and mold cavity subsequent to the step shown in FIG. 10 is an enlarged cross sectional view of the globe mold core and mold cavity during the forming operation of FIG. 11 is an exploded cross sectional view of the globe of FIG.
2 subsequent to forming the sheet into a hemispherical shape; FIG. 1 illustrating the manner in which the globe sections are assembled; and FIG. This invention comprises a globe in relief and a method for manufacture of such a globe including the steps of: printing a predetermined substantially two dimensional map pattern onto a thin, flexible, flat plastic sheet; shaping the plastic sheet into a substantially hemispherical shape or into some other curved configuration that represents a portion of a sphere; positioning the shaped sheet in a mold cavity which includes a relief area pattern; positioning a mold core in spaced relation to the back side of the flexible plastic sheet; injecting a hardenable plastic material between the mold core and sheet to form the sheet against the mold cavity and thereby define relief areas in a predetermined three-dimensional pattern on the sheet; and hardening a layer of the plastic material onto the back side of the sheet to fill the cavities with a substantially solid material and provide a solid backing for the entire surface of the sheet.