Patent ID: 8647093

Claim:
A device for the manufacture of a tray ( 6 ) of cellulose material, which comprises: a compression mould ( 3 ) comprising an essentially flat bottom end ( 36 ) and surrounding sides ( 37 ) for compression moulding and drying of cellulose pulp to a finished tray; and a male mould ( 2 ) that is arranged to fit into the compression mould ( 3 ) and that comprises a bottom space ( 26 ) and lateral surfaces ( 27 ) corresponding to the compression mould ( 3 ), wherein the compression mould ( 3 ) and the male mould ( 2 ) between themselves delimit a mould space ( 30 ) comprising a base section ( 30 a ) and a side section ( 30 b ) for compression moulding of the cellulose pulp, wherein both the compression mould ( 3 ) and the male mould ( 2 ) are provided with blow and suction devices for blowing in and suction of fluid in and out of the mould space ( 30 ), wherein the blow and suction devices of both the compression mould ( 3 ) and of the male mould ( 2 ) comprise an inlet pipe ( 23 , 33 ) having an inlet valve, which is coupled to an inlet chamber ( 28 , 38 ) in connection with the mould space ( 30 ) and an outlet pipe ( 24 , 34 ) having an outlet valve, which is separated from the inlet pipe ( 23 , 33 ) and coupled to an outlet chamber ( 29 , 39 ) in connection with the mould space ( 30 ), whereby fluid that is free from impurities is arranged to be lead into the mould via the respective inlet pipes ( 23 , 33 ) and the inlet chambers ( 28 , 38 ), and whereby the fluid from the mould space ( 30 ) is arranged to be lead away via the outlet chambers ( 29 , 39 ) and the outlet pipes ( 24 , 34 ) without contaminating the respective inlet pipe ( 23 , 33 ), and wherein the male mould ( 2 ) is provided with slits ( 51 ) that connect an upper edge section ( 30 c ) of the mould space ( 30 ) with the inlet chamber ( 28 ) and the outlet chamber ( 29 ) of the male mould ( 2 ) for blowing in and suction of fluid to and from the mould space ( 30 ).