Protective hood for pelleting presses
AssigneeFa. Wilhelm Fette GmbH
InventorsKonrad Friedrichs, Jurgen Hinzpeter, Walter Brauner
Life of this patent
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Abstract
A protective hood for a tablet compressing machine includes a heavy cover plate 12 resiliently supported on the top of the machine frame 11, vertical support members 14, hinged windows 16 secured to the support members by locks 21, and acoustical absorption plates 15 above and below the windows. Environmental integrity is implemented by channel members 17 around the edges of the support members and provided with chambers 18 kept at a positive pressure through inlets 19. The chambers are closed by rubber seals 20 around the edges of the windows 16.
Claims5
A tablet compressing machine comprising a plurality of lateral walls for enclosing a pelleting press and defining a protective hood, and wherein at least one of said walls includes an opening therein providing access to the hood interior, and a window hinged to said at least one wall for closing off said opening, and wherein said at least one wall comprises an airtight closure for sealing said window about said opening, the improvement wherein:
- said closure comprises a profile strip defining a sealed air chamber facing said window and air connecting channels disposed within said profile strip and opening to said air chamber for subjecting said air chamber to positive air pressure,
- whereby, upon loss of seal between said air tight closure and said window, positive air pressure exiting from said chamber and between said window and said closure prevents contamination of the interior of said hood by the atmosphere.
Dependencies are inferred from the claim text.