摘要:
In or for use with a printing apparatus having a printing cylinder (30), apparatus for transferring blanks (24), which apparatus comprises a passageway connectable to suction means, transfer means (34) for assisting the transfer of blanks through the apparatus and duct means (60) adjacent said transfer means, the arrangement being such that, in use, a pressure differential is created by extraction of fluid from the apparatus for urging blanks (24) against the transfer means (34), and fluid is caused to pass from said duct means (60) into said apparatus to inhibit contamination of said printing cylinder with dust, characterised by a board guide (50) adjacent said transfer (34) means such that upon fluid extraction the pressure differential is created across said board guide, the higher pressure located between said duct means (60) and said board guide (50), and whereby blanks transferred through the apparatus between the duct means (60) and the board guide (50) are urged onto said transfer means (34) by the higher pressure, said board guide (50) further inhibiting contamination of said printing cylinder with dust.
摘要:
A flexographic printing machine which comprises a printing cylinder (10'') and pressure applying means (20) for, in use, urging material against said printing cylinder (10'') to facilitate the transfer of an image to said material, characterised in that, in use, said pressure applying means (20) ejects a fluid which directly or indirectly urges said material against said printing cylinder (10'').
摘要:
A machine (10) for folding a sheet (16) of cardboard, which machines comprises: (a) a conveyor (14) for conveying said sheet (16) through said machine (10) in a first direction (A), and (b) folding means for engaging a first portion (16A) of said sheet (16) and folding it relative to a second portion (16E) thereof.
摘要:
A machine for stacking sheets into bundles comprises: a stacking area; at least one overhead conveyor (50) arranged above said stacking area; suction means for drawing successive sheets into contact with an underside of said at least one overhead conveyor (50); and means for disengaging said sheets from said at least one overhead conveyor (50) wherein in use successive sheets are drawn into contact with said underside of said at least one overhead conveyor (50) and conveyed to a predetermined stacking position whereupon said sheets are disengaged from said at least one overhead conveyor (50) and fall to form a bundle of stacked sheets in said stacking area. There is also provided a machine for stacking sheets into a plurality separate stacks comprising: (a) conveyor means for successively conveying individual sheets into a stacking area; (b) first and second sets of support fingers extending horizontally in said stacking area; (c) said support fingers having lengths sufficient to support the entire weight of said stacks; (d) means for moving said first set of support fingers horizontally between a retracted position and an extended stacking position; (e) means for moving said second set of support fingers horizontally between a retracted position and an extended stacking position; (f) means for moving said first set of support fingers vertically; and (g) means for moving said second set of support fingers vertically so as to sequentially support the full weight of said stacks on said first and second sets of support fingers.
摘要:
A paperboard processing machine (10) is disclosed for printing and otherwise processing sheets of paperboard (12), such as corrugated container blanks, and in which the sheets are conveyed from one section of the machine to another section by one or more vacuum transfer systems (16). Each vacuum transfer system (16) comprises an enclosure which is closed by a closure plate (40) for creating a subatmospheric pressure, which pressure forces the sheets into frictional engagement with the reaches of a plurality of conveyor belts (34) whereby the sheets are transported without contact of the opposite side of the sheet not contacted by the conveyor reach. In one embodiment the closure plate (40) is imperforate, while in the second embodiment the closure plate is provided with a limited number of apertures for providing a secondary flow of air upwardly against the bottom surfaces of the paperboard sheets. In addition, in one preferred embodiment, a plurality of slots are provided in the closure plate (40) for reducing the inflow of air at the entrance and exit ends (45) of the transfer section.
摘要:
A sheet (64) processing apparatus, for example for flexographic printing and die-cutting of corrugated paperboard container blanks, has first and second successive processing sections (14, 18) connected by a transfer section (16). The sheets are successively passed through the various sections in positional registrations therewith. A sensor (40) senses a sheet while in the transfer section (16) and provides a signal representative of the positional registration of the sheet in the transfer section. A computer system (50) determines from the signal whether the sheet would enter the second section (18) in correct positional registration for processing by the second section, and adjusts as necessary the positional registration of the sheet (64) while in the transfer section to cause the sheet to enter the second section (18) in correct positional registration therewith. Preferably, the transfer section (16) is a vacuum conveyor (41) independently driven by one or more electric servo motors (38), the conveyor being both accelerated and decelerated to adjust sheet registration.
摘要:
In or for use in an apparatus, a device for removably mounting a cylinder, which device comprises:
a first support (12; 52) for connection to a cylinder (10) ; a second support (24; 54) integral with, or adapted to be secured to, a journal (20) in said apparatus; and a connecting means (44; 64, 78) for removably connecting said first support (12; 52) to said second support (24; 54), the arrangement being such that, in use, said connecting means (44; 64, 78) can be released to permit said first support (12; 52) to be removed from and inserted into said apparatus whilst said second support (24; 54) remains mounted thereon.
摘要:
A machine (10) for folding a sheet (16) of cardboard, which machines comprises:
(a) a conveyor (14) for conveying said sheet (16) through said machine (10) in a first direction (A), and (b) folding means for engaging a first portion (16A) of said sheet (16) and folding it relative to a second portion (16E) thereof.
摘要:
A method for breaking bundles of sheets along a predetermined break line, sad bundles comprising a first portion on one side of said break line and a second portion on the other side of said break line characterised in that said method comprises the step of moving said first portion away from said second portion so as to progressively break said bundle along said break line. A breaker for breaking bundles of sheets along a predetermined break line, said bundles (30) comprising a first portion (30A) on one side of said break line and a second portion (30B) on the other side of said break line, the breaker characterised in that it provides means for moving said first portion (30A) away from said second portion (30B) such that, in use, the first portion (30A) is progressively broken away from said bundle (30) along said break line.