METHOD AND APPARATUS FOR DRY MANUFACTURING RIGID CELLULOSE PRODUCTS
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United States of America Patent
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Issued Date -
Jul 18, 2024
app pub date -
Jan 17, 2022
filing date -
May 12, 2021
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Abstract
An apparatus for dry manufacturing rigid cellulose products having essentially non-flat general shape comprising a disintegrating unit, a cellulose blank forming unit, and a product forming unit. The cellulose blank forming unit comprises a dispenser for guiding a cellulose fibre carrying air flow from the disintegrating unit, and a forming drum having an outer surface comprising perforations. The outer surface is configured for receiving cellulose fibres and forming a continuous or discontinuous cellulose blank, and comprises a first area having a first perforation density and a second area having a second perforation density less than the first perforation density for forming the cellulose blank with higher grammage at first locations originating from the first area than at second locations originating the said second area. The apparatus further comprises an air removing device arranged inside the forming drum, and a support structure for receiving the cellulose blank from the forming drum.
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