Treatment of cellulosic materials

• US 4,860,685 A
• Filed: 03/09/1987
• Issued: 08/29/1989
• Est. Priority Date: 07/10/1985
• Status: Expired due to Term

• Current Assignee: Richard D. Smith
• Original Assignee: Richard D. Smith
• Inventors: Smith, Richard D.
• Primary Examiner(s): Stinson, Frankie L.
• Application Number:
  US07/049,394
• Time in Patent Office: 904 Days
• Field of Search: 134/94, 134/95, 134/96, 134/172, 134/198, 134/200, 134/201, 118/302, 118/429, 118/300, 118/500, 68/20, 68/205 R, 68/240, 427/421, 427/320, 427/140
• US Class Current: 118/300
• CPC Class Codes: D21H 25/18 of old paper as in books, documents, e.g. restoring

Abstract

A treatment system for cellulosic materials is provided which is particularly adapted for the manual treatment of single pages of books, as well as documents, engineering drawings, maps, and works of art on paper. The system includes a deacidification, self-pressurized solution comprising a deacidification agent, a lower alcohol solvent for the agent, a diluent, and a propellant; delivery apparatus for shipping, storing, and spraying the solution; and a novel cleaning solution for use in conjunction with the deacidification solution and apparatus.

Claims

1. A soft spray system for treatment of cellulosic materials having an image thereon, a delivery system in communication with a container and terminating in an airless spray gun, a deacidification solution in the container minimizing acid attack and aging of cellulosic materials, said solution including a deacidification agent comprising carbonated magnesium alkoxides, a lower alcohol for solubilizing said agent, said lower alcohol being present in an amount sufficient to dissolve said agent and less than that which will detrimentally affect the image, a diluent for said alcohol solution, a propellant having a boiling point below 0°

F. and an inert gas in such amount as to maintain a substantially uniform pressure in the container, said propellant serving to propel said deacidification solution from said container through said delivery system to said spray gun, and said solution and said propellant being substantially free from carbon dioxide gas.

2. A system in accordance with claim 1 which further includes a second container and a cleaning solution in said second container for cleaning said delivery system, said second container in communication with said delivery system, said cleaning solution including anhydrous methanol and a chlorofluorocarbon or chlorinated carbon.

3. A system in accordance with claim 2 wherein said chlorofluorocarbon is trichlorotrifluoroethane and said cleaning solution further includes a propellant serving to propel said cleaning solution from said second container through said delivery system to said spray gun.

4. A system in accordance with claim 3 wherein said propellant is a chlorofluorocarbon propellant.

5. A system in accordance with claim 2 further including a manifold connecting said container for said deacidification solution and said container for said cleaning solution to said delivery system.

6. A system in accordance with claim 2 wherein said container is additionally stabilized by addition of a small amount of an alkalizing agent to said cleaning solution.

7. A system in accordance with claim 1 wherein said diluent is a chloroflorocarbon compound having a boiling point below that of said lower alcohol.

8. A system in accordance with claim 1 wherein said propellant is a chlorofluorocarbon gas having a boiling point below 0°

F.

9. A system in accordance with claim 1 wherein said diluent is trichlorotrifluoroethane and said propellant is chlorodifluoromethane or dichlorodifluoromethane.

10. A system in accordance with claim 1 which further includes apparatus having a suction surface for holding the cellulosic materials and for minimizing damage to fragile materials.

11. A system in accordance with claim 1 wherein the deacidification agent is an alkaline earth alkoxide.

12. A system in accordance with claim 1 wherein the deacidification agent is a magnesium alkoxide.

13. A system in accordance with claim 1 wherein the deacidification agent is a magnesium alkoxide that has been carbonated with carbon dioxide.