摘要:
An ink separation device for a printing press ink feed control having a device for printing a color chart having randomly distributed color patches, and recording the cyan, magenta, yellow and black ink dot sizes (CMYK) for each color patch, a device for measuring the red, green, blue and infrared reflection value (RGBI) from each color patch, and recording the RGBI value for each of the color patches, a device for defining a transfer function which maps a four-dimensional RGBI vector into a four-dimensional CMYK vector, a device for forming RGBI measurements over a reference copy, and transferring each of the RGBI measurements into the corresponding CMYK ink dot size value, a device for forming RGBI measurements over a production copy, and transferring each of the RGBI measurements into the corresponding CMYK ink dot Size value, a device for forming the dot size ratio between the production copy and the reference copy to form the ink volume ratio between the reference and production copies and a device for adjusting and ink feed rate of the press.
摘要:
An ink separation device for a printing press ink feed control having a device for printing a color chart having randomly distributed color patches, and recording the cyan, magenta, yellow and black ink dot sizes (CMYK) for each color patch, a device for measuring the red, green, blue and infrared reflection value (RGBI) from each color patch, and recording the RGBI value for each of the color patches, a device for defining a transfer function which maps a four-dimensional RGBI vector into a four-dimensional CMYK vector, a device for forming RGBI measurements over a reference copy, and transferring each of the RGBI measurements into the corresponding CMYK ink dot size value, a device for forming RGBI measurements over a production copy, and transferring each of the RGBI measurements into the corresponding CMYK ink dot Size value, a device for forming the dot size ratio between the production copy and the reference copy to form the ink volume ratio between the reference and production copies and a device for adjusting and ink feed rate of the press.
摘要:
A gap adjusting device (10) for a rotary press comprises a frame (12) and a fountain roller (14) and a metering roller (26) which are both rotatably mounted relative to the frame (12). A gap (34) is defined between the metering roller (26) and the fountain roller (14), and an adjustment member (28) is provided which has an actuator (44) for alternatively moving the rollers (14, 26) toward and away from each other, thereby decreasing or increasing, respectively, the size of the gap (34). Additionally, the gap adjusting device (10) includes a stabilizing member (20) for stabilizing the metering roller (26).
摘要:
One or more flexible printing plates are installed on a print cylinder (10) through the use of one or more slots formed axially along the cylinder (10). A resilient spring clip is inserted into the slot (14), followed by a plate registration bracket with a registration pin which is secured in the slot (14) by retaining screws. Each printing plate has a lead edge and a tail edge with a notch in each edge. A lead edge is inserted into the slot (14) and is tensioned against a side wall of the slot by the spring clip. The notch on the lead edge engages the registration pin on the bracket. A tail edge is then inserted into the slot (14) between the lead edge and the spring clip. The tail edge notch also engages the registration pin.
摘要:
In order to permit automated setting of operating parameters while also facilitating the removal of paper jams, a device for adjusting the gap size between folding rollers (16,18) of a rotary press folding machine includes a pair of counter-rotating folding rollers (16,18) which define a folding nip or gap (17) therebetween. Each folding roller (16,18) is mounted to one end of a pivoting support arm (20,22), and a link arm (48,50) is slidably and pivotably mounted to the other end. An extensible member (78) connects the link arms to each other, which enables the distance between the rollers (16,18) to be quickly and easily adjusted. An inflatable bag (36) is disposed between the support arms (20,22) which forces the rollers (16,18) towards each other to resist spreading of the rollers (16,18) when a paper passes through the gap (17) between the rollers (16,18). The bag (36) can be quickly deflated from a remote location to allow removal of jammed papers, and can be quickly re-inflated to the desired setting to minimize down time. A control system (86) controlling both the extensible member (72) and the inflatable bag (36) permits rapid adjustment of the folding machine to accomodate changes in paper thickness.
摘要:
A fluid level detection system (50) for ink in a printing press (10) having a vessel (58) having walls (60) defining a chamber (62), an elongated rotatable shaft (64) in the chamber (62), a motor (66) for rotating the shaft (64), an elongated flexible blade (68) affixed to the shaft (64) such that the motor (66) rotates the blade (68), and a proximity sensor (72) adjacent the walls (60) of the vessel (58) to detect the rotating blade (68) in the absence of ink at the level of the blade (68), with the blade (68) flexing in the presence of ink such that the sensor (72) does not detect the blade (68).
摘要:
A control system (60) for a printing press having a printed copy, a device (68 and 70) for manually using the copy to control operation of the press based on information on the copy, and device (80 and 82) for automatically reading the copy while excluding any control by target information on the copy, and controlling operation of the press based upon information on the copy.
摘要:
An ink separation device for a printing press ink feed control having a device for printing a color chart having randomly distributed color patches, and recording the cyan, magenta, yellow and black ink dot sizes (CMYK) for each color patch, a device for measuring the red, green, blue and infrared reflection value (RGBI) from each color patch, and recording the RGBI value for each of the color patches, a device for defining a transfer function which maps a four-dimensional RGBI vector into a four-dimensional CMYK vector, a device for forming RGBI measurements over a reference copy, and transferring each of the RGBI measurements into the corresponding CMYK ink dot size value, a device for forming RGBI measurements over a production copy, and transferring each of the RGBI measurements into the corresponding CMYK ink dot Size value, a device for forming the dot size ratio between the production copy and the reference copy to form the ink volume ratio between the reference and production copies and a device for adjusting and ink feed rate of the press.