Resources Contact Us Home
Process and apparatus for automatically engraving stone memorial markers

Image Number 4 for United States Patent #5512005.

The present invention relates to process and apparatus for automatically engraving stone memorial markers comprised of granite or marble. The markers have their polished facing surfaces covered with a cut-out blast-resistant stencil having prescribed lettering, numerals, decorative patterns and the like. The markers are conveyed through a sand blast chamber at a uniform rate and plural direct-air-feed nozzles are moved uniformly transversely thereover to effect precisely uniform engraving of the facing surfaces. The engraving is more precisely defined to a prescribed uniform depth with finer detail than heretofore possible by manual or other automated single-nozzle methods. The plural nozzles are essentially continuously fed with pressurized air and blast cutting media to obtain faster and more accurate engraving.

  Recently Added Patents
Extensible framework for client-based active network measurement
Traffic flow analysis mitigation using a cover signal
Stable liquid VEGF antagonist formulations
Electronic device and printed circuit board
SONOS stack with split nitride memory layer
Servo write assembly
Case for camera
  Randomly Featured Patents
Use of dihydroquinoline to aid in increasing milk production and feed utilization
Stabilisation of double-stranded nucleic acids using proteins
ASIC including vertically stacked embedded non-flash re-writable non-volatile memory
Belt retractor for a vehicle safety belt
Structural member
AL-1 neurotrophic factor antibodies
Umbrella handle
Portable and removable fishing rod holding device
Tennis training device
Vibration mode responsive variable damping force shock absorber with feature of automatic selection of damping mode depending upon vibration mode of vehicular body