Pressurized machine for processing blanks
AssigneeWard Holding Company, Inc.
InventorJohn H. P. Andrews, Jr.
Life of this patent
Estimating the term…
Abstract
A machine is disclosed for printing and/or otherwise processing blanks of sheet material in which the interior of the machine is pressurized to a super-atmospheric pressure such that the blanks are forced firmly against the transfer conveyor between sections of the machine and dust in the ambient air is prevented from entering the machine and contaminating the print function.
Claims17
A machine for printing and otherwise processing blanks of sheet material comprising:
- (a) means forming a printing section;
- (b) means forming a processing section;
- (c) housing means surrounding said printing and process sect ions;
- (d) conveyor belt means having a lower reach for horizontally conveying said blanks from said printing section to said processing section within said housing means;
- (e) exhaust duct means positioned above said conveyor belt means for exhausting air from the interior of said housing means;
- (f) flow-restricting means positioned above said lower reach of said conveyor means for restricting the air flow passing therethrough and creating a pressure drop thereacross;
- (g) blower means for forcing air into said machine and creating a super-atmospheric pressure throughout the interior of said housing below said flow-restricting means;
- and
- (h) filter means for removing dust from said air forced into the interior of said housing whereby said blanks are forced upwardly against said lower reach of said conveyor belt means as said super-atmospheric air flows against said blanks and then through said flow-restricting means toward said exhaust duct means.
A machine for processing corrugated blanks with substantially reduced contamination by ambient air and controlling said blanks within said machine comprising:
- (a) means forming a horizontally extending elongated housing;
- (b) first and second processing sections positioned in said housing;
- (c) transfer means for transferring said blanks horizontally along a board line from said first processing section to said second processing section;
- (d) flow-restricting means extending horizontally above said board line for producing a pressure drop above said board line;
- and
- (e) blower means having an outlet connected to the interior of said housing for maintaining a super-atmospheric pressure throughout said housing below said board line for preventing the entrance of ambient air therein and for urging said blanks against said transfer means.
A machine for processing blanks of sheet material comprising:
- (a) means forming a housing;
- (b) first and second processing sections located within said housing and spaced apart horizontally from each other;
- (c) conveyor means for transferring said blanks from said first processing section to said second processing section;
- (d) flow-restricting means adjacent said conveyor means;
- and
- (e) blower means having an inlet and an outlet, said inlet being connected directly to ambient air exterior of said housing, said outlet being connected to the interior of said housing, and said blower means being of sufficient size and flow capacity for creating and maintaining a substantial super-atmospheric pressure throughout the interior of said housing below said flow-restricting means.
Dependencies are inferred from the claim text.