Edge and corner sanding attachment

#1. Field of Invention

#This invention relates to sanders, specifically removable edge and corner sanding attachment adaptable to all vibrating or orbital type sanders.

#2. Description of Prior Art

#FIG. 1 is a view in perspective of clamp-on type sander attachment on a typical sander.

#FIG. 2 is a view in perspective of disassembled clamp-on type sander attachment.

#FIG. 3 is a bottom view of clamp-on type sander attachment,

#As illustrated in FIGS. 1 to 3, my edge and corner sanding attachment invention is universally adaptable to all brands and types of vibrating and orbital sanders. Preferred embodiment sanding attachment is referred to as clamp-on type edge and corner sanding attachment. Clamp-on type attachment 11 is comprised of two halves. Clamp-on type attachment 11 mounts directly against edges of back-up plate and pad 13 and platen 15 of sander. Its trombone-like features permits adjustment plates 17 to accommodate different sizes of platens 15 and back-up plate and pad 13 of vibratory sander 19. Preferably, clamp-on type attachment 11 is made of metal or other types of material that demonstrate minimal distortion or bending when subjected to all of the physical requirements of subject sanding attachment. This includes the vibrating stresses transmitted to clamp-on type attachment 11 from platen 15 with ranges of ten to twenty five thousand vibrating oscillations per minute under continuous sanding operation. Plates 17 have tabs 21 bent or formed at 90 degree angles to plates 17. Tab pads 23 are affixed to tabs 21. Tab pads 23 are made of a hard but resilient material which, after assembly of complete clamp-on type attachment 11 to platen 15, fit tightly against platen 15 and absorb maximum vibrating oscillations from vibratory sander 19. Plate rod tubes 25 FIG.3 are fastened to the underside of each half of plates 17. Plate rods 27 are of an optimum length which will permit plates 17 and plate rod tubes 25 to be moved, in a trombone sliding action, to fit dimensions of platen 15 and back-up plate and pad 13 of any vibratory sander 19. Plate rods 27 are permanently fastened on one (1) tabbed edge of plate 17. Other ends of plate rods 27 are threaded to accept plate adjusting knobs 29 which have lock tight features. A finger-like extension extends outwardly from a corner of plate 17 a sufficient distance to allow adequate clearance between vibratory sander 19 and edges and corners to be sanded. Sanding foot rod 31 is permanently attached to this finger-like extension. One end of sanding foot rod 31 is permanently attached to the finger-like extension of plate 17. Other end of sanding foot rod 31 has a tapped and threaded screw hole 32. Preferred arced triangular sanding foot 33 has slightly arced edges and preferably made of metal of sufficient thickness to resist excessive bending. Subject arced triangular sanding foot 33 has a center hole 35 through which machine screw 37 fastens arced triangular sanding foot 33 to tapped and threaded screw hole 32 in sanding foot rod 31. Sanding foot pad 39 is permanently attached to bottom of arced triangular sanding foot 33. A pressure sensitive abrasive sheet 41 (sandpaper) with pressure sensitive releasably adhering features on its back, is attached to sanding foot pad 39.

#FIG.4 illustrates another embodiment of the preferred edge and corner sanding system which utilizes a sandwich plate 43. Subject sandwich plate embodiment FIG. 4 is preferably made of a rigid material, such as metal, to minimize distortion and to maximize transmission of sander vibrating oscillations from platen 15. The end of sandwich plate 43 which contains the four threaded holes 53 is bent perpendicular to the surface fastened to platen 15. The four pad and platen fastening holes 45 in sandwich plate 43 align with the holes on platen 15 and back-up plate and pad 13 which allow back-up plate and pad 13 and sandwich plate 43 to be fastened to platen 15 by means of platen retaining screws 47. Sanding foot bracket 49 fastens to sandwich plate 43 with four sanding foot bracket retaining screws 51 into threaded holes 53. Sanding foot bracket 49 extends outwardly at an angle to which sanding foot rod 31 is permanently attached. Sanding foot rod 31 has a tapped and threaded screw hole 32. Preferred arced triangular sanding foot 33 has slightly arced edges and preferably made of metal of sufficient thickness to resist excessive bending. Subject arced triangular sanding foot 33 has a center hole 35 through which machine screw 37 fastens arced triangular sanding foot 33 to tapped and threaded screw hole 32 in sanding foot rod 31. Sanding foot pad 39 is permanently attached to bottom of arced triangular sanding foot 33. A pressure sensitive abrasive sheet 41 (sandpaper) with pressure sensitive releasably adhering features on its back, is attached to sanding foot pad 39.

#FIG. 5 shows a plate 52 embodiment of the preferred edge and corner sanding system. Plate holes 54 align with pad and platen fastening holes 45 as illustrated in FIG. 4. Sanding foot rod 31, and all components thereof, are the same as all components of sanding foot rod 31 FIG. 4 and those in FIG. 6 which are also described in description of preferred and other embodiments.