US3922397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for bleaching furniture
Assignee: Armstrong World Industries Inc
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Filing: 1974-03-04
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Granted: 1975-11-25
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Expires: 1994-03-04
Abstract
Abstract A method and apparatus is utilized for bleaching furniture through the use of hydrogen peroxide and ammonia. The furniture to be bleached is placed on a conveyor which passes through an air lock structure into an ammonia chamber. Ammonia is delivered to the ammonia chamber and causes the bleaching of the furniture. The bleached furniture component is removed from the ammonia chamber through an air lock structure.
Inventors
- 👤 John W Baymiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:13
CPC Classifications
B; B27; B27K; B27K3/00; B27K3/02; B27K5/00; B27K5/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
256 words
THE METHOD OF BLEACHING FURNITURE COMPONENTS IN A TREATMENT APPARATUS COMPRISING THE STEPS OF: A. MOVING A PLURALITY OF FURNITURE COMPONENTS ON AN INTERMITTENTLY OPERATED CONVEYOR STRUCTURE TO MOVE THE FURNITURE COMPONENTS IN AN ENDLESS PATH, B. OPENING AN ENTRANCE DOOR TO A FIRST AIR LOCK MEANS MOVING A FIRST FURNITURE COMPONENT INTO SAID FIRST AIR LOCK, C. CLOSING SAID ENTRANCE DOOR TO SAID FIRST AIR LOCK MENAS AND THEN OPENING AN EXIT DOOR OF SAID FIRST AIR LOCK MEANS, SAID EXIT DOOR CONNECTING SAID FIRST AIR LOCK MEANS WITH FURNITURE COMPONENT TREATMENT AREA, D. MOVING SAID FIRST FURNITURE COMPONENT FROM SAID FIRST AIR TO SAID TREATMENT AREA, AND THEN CLOSING SAID FIRST AIR LOCK MEANS EXIT DOOR, E. MOVING A SECOND FURNITURE COMPONENT INTO SAID FIRST LOCK MEANS, F. SPRAYING AQUEOUS AMMONIA INTO SAID TREATMENT AREA AND BLEACHING SAID FIRST FURNITURE COMPONENT WITH THE AMMONIA FOR THE REQUIRED PERIOD OF TIME, G. OPENING AN ENTRANCE DOOR TO A SECOND AIR LOCK MEANS, SAID LAST MENTIONED ENTRANCE DOOR CONNECTING SAID TREATMENT AREA WITH SAID SECOND AIR LOCK MEANS, H. MOVING SAID FIRST FURNITURE COMPONENT INTO SAID SECOND AIR LOCK MEANS, AND CLOSING THE ENTRANCE DOOR OF SAID SECOND AIR LOCK MEANS WHILE AT THE SAME TIME MOVING SAID SECOND FURNITURE COMPONENT INTO SAID TREATMENT AREA, I. THEN OPENING AN EXIT DOOR OF SAID SECOND AIR LOCK MEANS AND MOVING SAID FIRST FURNITURE COMPONENT FROM SAID SECOND AIR LOCK MEANS TO THE POINT WHEREIN THE FIRST FURNITURE COMPONENT STARTED ITS MOVEMENT TOWARDS THE FIRST AIR LOCK MEANS.
Claim 2
Independent Claim
256 words
THE METHOD OF BLEACHING FURNITURE COMPONENTS IN A TREATMENT APPARATUS COMPRISING THE STEPS OF: A. MOVING A PLURALITY OF FURNITURE COMPONENTS ON AN INTERMITTENTLY OPERATED CONVEYOR STRUCTURE TO MOVE THE FURNITURE COMPONENTS IN AN ENDLESS PATH, B. OPENING AN ENTRANCE DOOR TO A FIRST AIR LOCK MEANS MOVING A FIRST FURNITURE COMPONENT INTO SAID FIRST AIR LOCK, C. CLOSING SAID ENTRANCE DOOR TO SAID FIRST AIR LOCK MENAS AND THEN OPENING AN EXIT DOOR OF SAID FIRST AIR LOCK MEANS, SAID EXIT DOOR CONNECTING SAID FIRST AIR LOCK MEANS WITH FURNITURE COMPONENT TREATMENT AREA, D. MOVING SAID FIRST FURNITURE COMPONENT FROM SAID FIRST AIR TO SAID TREATMENT AREA, AND THEN CLOSING SAID FIRST AIR LOCK MEANS EXIT DOOR, E. MOVING A SECOND FURNITURE COMPONENT INTO SAID FIRST LOCK MEANS, F. SPRAYING AQUEOUS AMMONIA INTO SAID TREATMENT AREA AND BLEACHING SAID FIRST FURNITURE COMPONENT WITH THE AMMONIA FOR THE REQUIRED PERIOD OF TIME, G. OPENING AN ENTRANCE DOOR TO A SECOND AIR LOCK MEANS, SAID LAST MENTIONED ENTRANCE DOOR CONNECTING SAID TREATMENT AREA WITH SAID SECOND AIR LOCK MEANS, H. MOVING SAID FIRST FURNITURE COMPONENT INTO SAID SECOND AIR LOCK MEANS, AND CLOSING THE ENTRANCE DOOR OF SAID SECOND AIR LOCK MEANS WHILE AT THE SAME TIME MOVING SAID SECOND FURNITURE COMPONENT INTO SAID TREATMENT AREA, I. THEN OPENING AN EXIT DOOR OF SAID SECOND AIR LOCK MEANS AND MOVING SAID FIRST FURNITURE COMPONENT FROM SAID SECOND AIR LOCK MEANS TO THE POINT WHEREIN THE FIRST FURNITURE COMPONENT STARTED ITS MOVEMENT TOWARDS THE FIRST AIR LOCK MEANS.
Claim 3
Dependent Claim
63 words
The method of claim 1 wherein there is the further step of: j. exhausting air from the vicinity of the entrance door of the first air lock means and the exit door of the second air lock means to prevent residual ammonia gases in said air lock means from escaping from within the treatment apparatus to the area outside of the treatment apparatus.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |