CA1224966A - Device for checking the lateral sheet position as well as for interrupting the sheet feed in the case of incorrect lateral sheet position - Google Patents
Device for checking the lateral sheet position as well as for interrupting the sheet feed in the case of incorrect lateral sheet positionInfo
- Publication number
- CA1224966A CA1224966A CA000426315A CA426315A CA1224966A CA 1224966 A CA1224966 A CA 1224966A CA 000426315 A CA000426315 A CA 000426315A CA 426315 A CA426315 A CA 426315A CA 1224966 A CA1224966 A CA 1224966A
- Authority
- CA
- Canada
- Prior art keywords
- sheet
- pull
- feeder
- sensor
- logic control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
- B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
- B65H7/06—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed
- B65H7/10—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed responsive to incorrect side register
Abstract
ABSTRACT
In order to check the correct sheet infeed and the lateral position of the sheet, sensors are attached to the feeder of sheet-fed rotary printing presses with pull-type lays. The signals supplied from the sensors are processed by digital control electronics and influence the control of the press. Each pulling operation is monitored in this manner. The respective operating statuses and the respective monitoring operations are made visible on a light-emitting diode display panel with the aid of the signal sequence.
In order to check the correct sheet infeed and the lateral position of the sheet, sensors are attached to the feeder of sheet-fed rotary printing presses with pull-type lays. The signals supplied from the sensors are processed by digital control electronics and influence the control of the press. Each pulling operation is monitored in this manner. The respective operating statuses and the respective monitoring operations are made visible on a light-emitting diode display panel with the aid of the signal sequence.
Description
HEIDELBERG ~ -341 ~ 1 - 24 . 05 . 1982 The invention relates to a feeder for sheet-fed rotary printing presses with pull-type lays which are coupled to the press drive and impart a pulling motion to each incoming sheet, also with a device for checking the correct lateral sheet position as well as for inter-rupting the sheet feed in the case of incorrect sheet position.
Known versions of the above-mentioned invention are single-sheet feeders or stream feeders. The aligning of a sheet, essential for accurate printing, takes place in two directions during transport over the feed table, firstly the front alignment, and secondly the lateral alignment. Several front lays guarantee reliable positioning of the sheet front edge. Lateral aligning takes place usually through pull-type lays.
Pull-type lays on sheet fed printing presses have the task of precisely aligning the incoming sheet by means of lateral pulling. This alignment must take place with extreme precision since errors in alignment may result in differences in the inking between the copies.
Sheet-fed printing presses with pull-type lays are known from publication DE-OS 30 11 626 ~1. The sheet which is being aligned is pressed onto the suction open-ings in the sheet plate with the aid of a dabber roller.
The vacuum which supports the acceleration process can act for a defined period of time so that the great static friction when the sheet is at rest is over-come and the sheet is prevented from fouling on the stop by switching off the suction air.
HEIDELBERG A-341 - 2 - 24.05.1982 Publication DE-OS 24 60 747 also discloses devices for the in-registe~ positioning of the sheets which are to be printed. A device is described which obtains the desired positioning accuracy without the use of pull-type lays. A measuring head with two photo~sensors is attached at the side of the feed plate, and the ascertained later~al difference is used as a guide for the lateral displacement of the gripper drum. However, the lateral displacement of the gripper drum is diffi-cult from the mechanical and technical point of view and does not always lead to in-register positioning.
Furthermore, the use of twophoto-sensors is very costly.
The object of the invention is, using the simplest means, to monitor both the correct pulling end position as well as the pulling operation, and to shorten the set-up times and downtimes of the sheet-fed rotary printing presses.
The object of the invention is achieved in that a sensor is disposed at at least one lateral edge of the feeder for checking the correct sheet infeed and the lateral position of the sheet whereby said sensor supplies signals which are processed by digital control electronics, thus influencing the control of the press.
An advantage of this is that thanks to the display on the light-emitting diode display panel the operato~
of the sheet-fed rotary printing press knows immediately which kind of fault is present and, there-fore, can immediately take appropriate action.
A further embodiment of the invention consists in that the sensor is so disposed that before the pulling r H~IDEL~RG A-341 - 3 - 24.05.1982 motion the sheet is first of all outside, but at the end of the pulling motion inside the response range of the sensor whereby a corresponding annunciation is made through the control electronics.
An embodiment of the invention is that the control electronics annunciates a fault if a sheet is already in the response range of the sensor before the pulling operation.
In an advantageous embodiment of the invention from the signal sequence supplied by the sensors in whose response range the sheet assumes its two setpoint positions before and after pulling the control electronics detects the assignment of one of the sensors to the direction of motion of the pull-type lays in the case of a change in pulling direction and thereafter only annunciates a fault on the basis of signal sequences from this sensor.
The sensors may consist either of reflex switches or light barriers or reflex light barriers. They may also be capacitive or pneumatic measuring pickups.
In an embodiment of the invention coupled to the control electronics is a light-emitting diode display panel with the respective relevant operating statuses and the light-emitting diodes indicating faults. The lighting up of the corresponding light-emitting diodes makes it possible to detect the fault easily and quickly, which has a positive effect on the undesired downtimes of sheet-fed rotary printing presses.
f ~ d ;~
HEIDELBERG A-34 1 - 4 - 24 . 05 .1982 The digital control electronics is so designed that the signals from the sensors on the setpoint position of the sheet are, through the intermediary of a buffer memory an`d a read-only memory, displayed on the light-emitting diode display panel or, in the event of incorrect position of the sheet, the control electronics triggers an alarm, visual or audible, or influences the control of the press.
A further advantage of the invention is that the sensors are independent of the pulling direction, i.e. they are functionally and structurally so designed that they are equally suitable for both pulling directions.
The device according to the invention thus permits improved monitoring and aligning of the sheet feedO
The automatic detection of the pulling direction makes it possible, with the aid of the sensors, to change the pulling direction without any additional effort.
Without this automatic change of pulling direction it would be necessary to switch-over the control cr to remove the unused sensor from the working area or to convert the sensor to the other side.
An embodiment of the invention is described in the following with reference to the drawings.
Fig. 1 shows a sheet-fed printing press with feed and delivery table.
Fig. 2 shows an arrangement of the pull-type lay-check on the feed table with sheet resting in position before the pulling operation.
Fig. 3 shows a slot initiator in position a.
~2~
-HEID~LBERG A-341 - 5 - 24.05.1982 Fig. 4 shows an arrangement of the pull-type lay check on the feed table with sheet resting in position after the pulling operation.
Fig. 5 shows a slot initiator in position b.
_ Fig. 6 shows a flowchart.
Fig. 7 shows a block diagram.
Fig. 8 shows a light emitting diode display panel.
In the in-line sheet-fed printing press 1 shown in Fig. 1 the sheets 8 being printed are fed from a sheet feeder 12 via the feed table 2 to the feed drum 13 of a first printing unit 14. The printing unit 14 includes a plate cylinder 21, rubber-covered cylinder 16 and an impression cylinder 15. After each sheet 8 has been provided with a first print, it is transferred via transport cylinders 17 and a transfer drum 18 lying between the latter to a further printing unit 19. The printing unit 19, in turn, includes a plate cylinder 21, rubber-covered cylinder 16 and a back-pressure cylinder 22. After the sheet 8 has been provided with a further print in the printing unit 19, the sheet is delivered onto a delivery pile 4 with the aid of a delivery chain 20.
Sheet checking elements, e.g. in the form of reflex switches 7, are attached to the feed table 2 in the front side region. A slot initiator 23, consisting of a scanning switch 10 and a scanning disc 11, is coupled via control electronics to the sheet checking elements in the form of reflex switches 7. The scanning disc 11 of the slot initiator 23 is mounted on a single-revol~tion shaft which is not shown in any greater detail. The scanning disc 11 which is controlled by the machine cycle can assume two scanning points, namely a and b. The scanning disc 11 of the HEIDELBERG A-341 - 6 - 24.05.1982 slot initiator 23 shown in Fig. 3 is in scanning p~int a.
This means that the sheet 8 is already up against the front lays 6, as shown in Fig. 2, but the sheet 8 has not yet been pulled against the side lay 24 by the pull-type lay 9. Due to the sequence of the machine, the sheet 8 is now pulled by the pull type lay 9, for example, to the left to the side lay 24. At the same time, the scanning disc 11 of the slot initiator 23 reaches scanning point b, as shown in Fig. 5. After the pulling operation the sheet 8 is in the response xange of the reflex switch 7 and on the side lay 24 of the pull-type lay 9, as shown in Fig. 4.
The flowchart shown in Fig. 6 shows the schematic sequence of pull-type lay checking.
With the power supply switched on and the sheet-fed printing press 1 running, the control electronics detects on the basis of the signal sequence of the scanning switch 10 together with the two reflex switches 7 whether the pulling operation is ended. In accordance with the signal sequence stored in the control electronics, the control electronics decide auto-maticaily the pulling direction, either "right" or "left".
If no definitive signal sequence is delivered by the sensors, there is a fault annunciation, and scanning is repeated.
After the control electronics, on the basis of the delivered signal sequence, has detected that, for example, pull~nq has tak place to the le~t, this i~
HEIDELBERG A-34 1 - 7 - 24 . 05 .1982 indicated on the light-emitting diode display panel 33 which i5 fixed easily visible for the printer on a metal wall between the sheet feeder 12 and printing unit 14 of the sheet-fed printing press.
Each pulling operation is monitored in this manner.
If, after the pulling operation is completed, there is no signal sequence corresponding to the pulling operation "left", the control electronics gives a fault annunciation which is indicated on the light-emitting diode display panel 33.
At the same time, the control electronics monitors whether the pulling direction has changed on the basis of the signal sequence at the reflex switches 7. If there has been no change, there is clearly a pulling fault which is likewise indicated on the light-emitting diode display panel 33.
If, on the basis of the signal sequence, a change of pulling direction has been detected, the control electronics automatically monitors the pulling operation "right", and once again there is an indication on the light-emitting diode display panel 33. The scanning points, the in~ormation on the respective operating statuses and the automatic decision on the pulling direction which goes to the right just as well as to the left are repeated for each newly incoming sheet.
The block diagram of the pull-type lay check shown in Fig. 7 shows a machine cycle 25 which controls the period of time for measuring the actual values through
Known versions of the above-mentioned invention are single-sheet feeders or stream feeders. The aligning of a sheet, essential for accurate printing, takes place in two directions during transport over the feed table, firstly the front alignment, and secondly the lateral alignment. Several front lays guarantee reliable positioning of the sheet front edge. Lateral aligning takes place usually through pull-type lays.
Pull-type lays on sheet fed printing presses have the task of precisely aligning the incoming sheet by means of lateral pulling. This alignment must take place with extreme precision since errors in alignment may result in differences in the inking between the copies.
Sheet-fed printing presses with pull-type lays are known from publication DE-OS 30 11 626 ~1. The sheet which is being aligned is pressed onto the suction open-ings in the sheet plate with the aid of a dabber roller.
The vacuum which supports the acceleration process can act for a defined period of time so that the great static friction when the sheet is at rest is over-come and the sheet is prevented from fouling on the stop by switching off the suction air.
HEIDELBERG A-341 - 2 - 24.05.1982 Publication DE-OS 24 60 747 also discloses devices for the in-registe~ positioning of the sheets which are to be printed. A device is described which obtains the desired positioning accuracy without the use of pull-type lays. A measuring head with two photo~sensors is attached at the side of the feed plate, and the ascertained later~al difference is used as a guide for the lateral displacement of the gripper drum. However, the lateral displacement of the gripper drum is diffi-cult from the mechanical and technical point of view and does not always lead to in-register positioning.
Furthermore, the use of twophoto-sensors is very costly.
The object of the invention is, using the simplest means, to monitor both the correct pulling end position as well as the pulling operation, and to shorten the set-up times and downtimes of the sheet-fed rotary printing presses.
The object of the invention is achieved in that a sensor is disposed at at least one lateral edge of the feeder for checking the correct sheet infeed and the lateral position of the sheet whereby said sensor supplies signals which are processed by digital control electronics, thus influencing the control of the press.
An advantage of this is that thanks to the display on the light-emitting diode display panel the operato~
of the sheet-fed rotary printing press knows immediately which kind of fault is present and, there-fore, can immediately take appropriate action.
A further embodiment of the invention consists in that the sensor is so disposed that before the pulling r H~IDEL~RG A-341 - 3 - 24.05.1982 motion the sheet is first of all outside, but at the end of the pulling motion inside the response range of the sensor whereby a corresponding annunciation is made through the control electronics.
An embodiment of the invention is that the control electronics annunciates a fault if a sheet is already in the response range of the sensor before the pulling operation.
In an advantageous embodiment of the invention from the signal sequence supplied by the sensors in whose response range the sheet assumes its two setpoint positions before and after pulling the control electronics detects the assignment of one of the sensors to the direction of motion of the pull-type lays in the case of a change in pulling direction and thereafter only annunciates a fault on the basis of signal sequences from this sensor.
The sensors may consist either of reflex switches or light barriers or reflex light barriers. They may also be capacitive or pneumatic measuring pickups.
In an embodiment of the invention coupled to the control electronics is a light-emitting diode display panel with the respective relevant operating statuses and the light-emitting diodes indicating faults. The lighting up of the corresponding light-emitting diodes makes it possible to detect the fault easily and quickly, which has a positive effect on the undesired downtimes of sheet-fed rotary printing presses.
f ~ d ;~
HEIDELBERG A-34 1 - 4 - 24 . 05 .1982 The digital control electronics is so designed that the signals from the sensors on the setpoint position of the sheet are, through the intermediary of a buffer memory an`d a read-only memory, displayed on the light-emitting diode display panel or, in the event of incorrect position of the sheet, the control electronics triggers an alarm, visual or audible, or influences the control of the press.
A further advantage of the invention is that the sensors are independent of the pulling direction, i.e. they are functionally and structurally so designed that they are equally suitable for both pulling directions.
The device according to the invention thus permits improved monitoring and aligning of the sheet feedO
The automatic detection of the pulling direction makes it possible, with the aid of the sensors, to change the pulling direction without any additional effort.
Without this automatic change of pulling direction it would be necessary to switch-over the control cr to remove the unused sensor from the working area or to convert the sensor to the other side.
An embodiment of the invention is described in the following with reference to the drawings.
Fig. 1 shows a sheet-fed printing press with feed and delivery table.
Fig. 2 shows an arrangement of the pull-type lay-check on the feed table with sheet resting in position before the pulling operation.
Fig. 3 shows a slot initiator in position a.
~2~
-HEID~LBERG A-341 - 5 - 24.05.1982 Fig. 4 shows an arrangement of the pull-type lay check on the feed table with sheet resting in position after the pulling operation.
Fig. 5 shows a slot initiator in position b.
_ Fig. 6 shows a flowchart.
Fig. 7 shows a block diagram.
Fig. 8 shows a light emitting diode display panel.
In the in-line sheet-fed printing press 1 shown in Fig. 1 the sheets 8 being printed are fed from a sheet feeder 12 via the feed table 2 to the feed drum 13 of a first printing unit 14. The printing unit 14 includes a plate cylinder 21, rubber-covered cylinder 16 and an impression cylinder 15. After each sheet 8 has been provided with a first print, it is transferred via transport cylinders 17 and a transfer drum 18 lying between the latter to a further printing unit 19. The printing unit 19, in turn, includes a plate cylinder 21, rubber-covered cylinder 16 and a back-pressure cylinder 22. After the sheet 8 has been provided with a further print in the printing unit 19, the sheet is delivered onto a delivery pile 4 with the aid of a delivery chain 20.
Sheet checking elements, e.g. in the form of reflex switches 7, are attached to the feed table 2 in the front side region. A slot initiator 23, consisting of a scanning switch 10 and a scanning disc 11, is coupled via control electronics to the sheet checking elements in the form of reflex switches 7. The scanning disc 11 of the slot initiator 23 is mounted on a single-revol~tion shaft which is not shown in any greater detail. The scanning disc 11 which is controlled by the machine cycle can assume two scanning points, namely a and b. The scanning disc 11 of the HEIDELBERG A-341 - 6 - 24.05.1982 slot initiator 23 shown in Fig. 3 is in scanning p~int a.
This means that the sheet 8 is already up against the front lays 6, as shown in Fig. 2, but the sheet 8 has not yet been pulled against the side lay 24 by the pull-type lay 9. Due to the sequence of the machine, the sheet 8 is now pulled by the pull type lay 9, for example, to the left to the side lay 24. At the same time, the scanning disc 11 of the slot initiator 23 reaches scanning point b, as shown in Fig. 5. After the pulling operation the sheet 8 is in the response xange of the reflex switch 7 and on the side lay 24 of the pull-type lay 9, as shown in Fig. 4.
The flowchart shown in Fig. 6 shows the schematic sequence of pull-type lay checking.
With the power supply switched on and the sheet-fed printing press 1 running, the control electronics detects on the basis of the signal sequence of the scanning switch 10 together with the two reflex switches 7 whether the pulling operation is ended. In accordance with the signal sequence stored in the control electronics, the control electronics decide auto-maticaily the pulling direction, either "right" or "left".
If no definitive signal sequence is delivered by the sensors, there is a fault annunciation, and scanning is repeated.
After the control electronics, on the basis of the delivered signal sequence, has detected that, for example, pull~nq has tak place to the le~t, this i~
HEIDELBERG A-34 1 - 7 - 24 . 05 .1982 indicated on the light-emitting diode display panel 33 which i5 fixed easily visible for the printer on a metal wall between the sheet feeder 12 and printing unit 14 of the sheet-fed printing press.
Each pulling operation is monitored in this manner.
If, after the pulling operation is completed, there is no signal sequence corresponding to the pulling operation "left", the control electronics gives a fault annunciation which is indicated on the light-emitting diode display panel 33.
At the same time, the control electronics monitors whether the pulling direction has changed on the basis of the signal sequence at the reflex switches 7. If there has been no change, there is clearly a pulling fault which is likewise indicated on the light-emitting diode display panel 33.
If, on the basis of the signal sequence, a change of pulling direction has been detected, the control electronics automatically monitors the pulling operation "right", and once again there is an indication on the light-emitting diode display panel 33. The scanning points, the in~ormation on the respective operating statuses and the automatic decision on the pulling direction which goes to the right just as well as to the left are repeated for each newly incoming sheet.
The block diagram of the pull-type lay check shown in Fig. 7 shows a machine cycle 25 which controls the period of time for measuring the actual values through
2~ 3G~
HEIDELBERG ~-3~1 8 - 24.05.1982 the comparator and the transmission of the signals to the light-emitting diode display panel 33, also refle~
switches 26 and 27 which are connected via amplifier 28 to the inputs of the buffer memory 29 whose inputs and outputs are symbolically grouped, and the outputs of the buffer memory 29 lead to the inputs of a read-only memory 30 whose outputs are connected partly to a light-emitting diode display panel 33 and to an audible fault annunciation device 32 (which is not shown in greater detail) and partly to the inputs of the bufEer memory 29.
The control electronics are designed such that, during one machine cycle 25, they scan the status of the reflex switches 26,27 twice. The first scanning point is before the pulling operation. The status oE the reflex switches 26,27 is transmitted via the amplifier 28 into the buffer memory 29 which conducts this information into an EPROM, a programmable read-only memory 30. The read-only memory 30 is programmed such that it waits for the status report of the second scan which consists in whether the sheet, after pulling, has reached the characteristic setpoint position or not.
~hen the read-only memory 30 has stored all the informa-tion necessary for a machine cycle 25, it transmits, in accordance with its programming, digital values to the light-emitting diode display panel 33 which re-produces the signal sequence of the respective operating status, or digital values are transmitted to the fault annunciation device 32 which consists of audible signal generators.
These scanning points and information on the respective operating statuses are repeated for each incoming sheet.
HEIDEI,BERG A~341 ~ 9 - 24.05.1982 The light-emitting diode display panel 33 in Fig. 8 consists of the indication elements 34 to 45 which light up accordingly for the respective operating statuses. More specifically, the indication elements 34 to 45 are shown in three rows; in one row are ^
the three light-emitting diodes 34, 35, 36. The light-emitting diodes 34, 35 are yellow illuminating indication elements for the right-hand/left-hand reflex switches respectively. The status of the slot initiator 23 is shown by the yellow light-emitting diode 36. In the next row the symbol illuminated fields 40, 41, 42, 43, 44, 45 indicate the respective pulling operations. The yellow symbol illuminatedfields40, 43 correspond to the side position. If the side position is correct, the symbol illumina~ed fields 44 and 41 light up green for the right-hand side and left-hand side respectively.
If the side position is incorrect the symbol illuminated fields 42 and 45 indicate the fault in red. The green light-emitting diodes 37, 39 indicate whether the sheet is correctly positioned, and incorrect positioning is indicated by light-emitting diode 38.
HEIDELBERG ~-3~1 8 - 24.05.1982 the comparator and the transmission of the signals to the light-emitting diode display panel 33, also refle~
switches 26 and 27 which are connected via amplifier 28 to the inputs of the buffer memory 29 whose inputs and outputs are symbolically grouped, and the outputs of the buffer memory 29 lead to the inputs of a read-only memory 30 whose outputs are connected partly to a light-emitting diode display panel 33 and to an audible fault annunciation device 32 (which is not shown in greater detail) and partly to the inputs of the bufEer memory 29.
The control electronics are designed such that, during one machine cycle 25, they scan the status of the reflex switches 26,27 twice. The first scanning point is before the pulling operation. The status oE the reflex switches 26,27 is transmitted via the amplifier 28 into the buffer memory 29 which conducts this information into an EPROM, a programmable read-only memory 30. The read-only memory 30 is programmed such that it waits for the status report of the second scan which consists in whether the sheet, after pulling, has reached the characteristic setpoint position or not.
~hen the read-only memory 30 has stored all the informa-tion necessary for a machine cycle 25, it transmits, in accordance with its programming, digital values to the light-emitting diode display panel 33 which re-produces the signal sequence of the respective operating status, or digital values are transmitted to the fault annunciation device 32 which consists of audible signal generators.
These scanning points and information on the respective operating statuses are repeated for each incoming sheet.
HEIDEI,BERG A~341 ~ 9 - 24.05.1982 The light-emitting diode display panel 33 in Fig. 8 consists of the indication elements 34 to 45 which light up accordingly for the respective operating statuses. More specifically, the indication elements 34 to 45 are shown in three rows; in one row are ^
the three light-emitting diodes 34, 35, 36. The light-emitting diodes 34, 35 are yellow illuminating indication elements for the right-hand/left-hand reflex switches respectively. The status of the slot initiator 23 is shown by the yellow light-emitting diode 36. In the next row the symbol illuminated fields 40, 41, 42, 43, 44, 45 indicate the respective pulling operations. The yellow symbol illuminatedfields40, 43 correspond to the side position. If the side position is correct, the symbol illumina~ed fields 44 and 41 light up green for the right-hand side and left-hand side respectively.
If the side position is incorrect the symbol illuminated fields 42 and 45 indicate the fault in red. The green light-emitting diodes 37, 39 indicate whether the sheet is correctly positioned, and incorrect positioning is indicated by light-emitting diode 38.
Claims (8)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a feeder for a sheet-fed printing machine having a feeder table and at least one pulling unit coupled to a drive of the printing machine for imparting to each newly arrived sheet, a defined direction of pull to laterally position side edges of a sheet, and a sensing arrangement for sensing the side edges of the sheet, said sensing arrangement comprising:
at least one sensor located on the feed table for sensing of the edge of the sheet when appropriately positioned and producing a first signal and in the absence of an appropriately positioned sheet producing a different signal, means associated with said sensor for activating said at least one sensor before and after said at least one pulling unit has imparted the defined direction of pull, electronic logic control means operatively responsive to the signals from said sensor that are produced before and after the defined direction of pull which determines if the sheet after the pull has been appropriately positioned, and indicator means operatively responsive to said electronic logic control means to produce an alarm indication when it is determined by the electronic logic control means that the sheet has not been appropriately positioned.
at least one sensor located on the feed table for sensing of the edge of the sheet when appropriately positioned and producing a first signal and in the absence of an appropriately positioned sheet producing a different signal, means associated with said sensor for activating said at least one sensor before and after said at least one pulling unit has imparted the defined direction of pull, electronic logic control means operatively responsive to the signals from said sensor that are produced before and after the defined direction of pull which determines if the sheet after the pull has been appropriately positioned, and indicator means operatively responsive to said electronic logic control means to produce an alarm indication when it is determined by the electronic logic control means that the sheet has not been appropriately positioned.
2. In a feeder for a sheet-fed printing machine according to Claim 1, wherein said signal from said sensor is independent of the direction of the pull and wherein the control logic is responsive to the sequence of said signals produced before and after the pull to determine the direction of pull imparted to the sheet and to produce a single alarm indication for indicating the absence of desired direction of pull.
3. In a feeder for a sheet-fed printing machine according to Claim 1, wherein said indicator means includes a light display field operatively responsive to the logic control for displaying visually the sequence of signals and the alarm indication produced by the logic control.
4. In a sheet feeder as claimed in Claim 1, including means for initially feeding sheets to the feeder table laterally offset to the desired lateral position to an extent sufficient to normally produce a first signal from said sensor indicating the sheet is not properly positioned.
5. In a feeder as claimed in Claim 4, wherein said electronic logic control means through said indicator means annuciates a fault if said sensor indicates a sheet is appropriately positioned.
6. In a feeder according to Claims 1 or 2, wherein the sensor is either a reflex switch (26, 27) or a light barrier or a reflex light barrier.
7. In a feeder according to Claims 1 or 2 wherein the sensor is a capacitive or pneumatic measuring pickup.
8. Feeder according to Claims 1 or 2 wherein coupled to the electronic logic control means is a light-emitting diode display panel which forms part of said indicator means and indicates faults.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3219653.9 | 1982-05-26 | ||
| DE3219653A DE3219653C1 (en) | 1982-05-26 | 1982-05-26 | Device for checking the side sheet feeder and for interrupting the sheet feed in the event of a defective side sheet feeder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1224966A true CA1224966A (en) | 1987-08-04 |
Family
ID=6164461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000426315A Expired CA1224966A (en) | 1982-05-26 | 1983-04-20 | Device for checking the lateral sheet position as well as for interrupting the sheet feed in the case of incorrect lateral sheet position |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0095044B1 (en) |
| JP (1) | JPS595546U (en) |
| AT (1) | ATE26099T1 (en) |
| CA (1) | CA1224966A (en) |
| DE (1) | DE3219653C1 (en) |
| ES (1) | ES8402794A1 (en) |
| FR (1) | FR2527577B1 (en) |
| IT (1) | IT1194250B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0718662Y2 (en) * | 1989-07-18 | 1995-05-01 | 株式会社小森コーポレーション | Edge pile position detection sensor for sheet pile in feeder |
| DE4001120C2 (en) * | 1990-01-17 | 1994-05-26 | Heidelberger Druckmasch Ag | Device for regulating the arrival of sheets in sheet-processing machines, in particular printing machines |
| DE102005019617A1 (en) * | 2004-12-22 | 2006-07-06 | Man Roland Druckmaschinen Ag | Sheet processing device e.g. sheet-fed printing press has capacitive sensor, which is provided in the area of adjustment or guiding device whereby feed device, is designed as feed table, on which sheets e.g. printed sheets can be moved |
| JP6858010B2 (en) * | 2016-12-09 | 2021-04-14 | 株式会社東芝 | Post-processing device and control method |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7132298U (en) * | 1971-12-16 | Augsburg Nuernberg Ag | Device for the photoelectric control of the page alignment of sheets in the system of a sheet-fed printing machine | |
| FR921311A (en) * | 1946-02-05 | 1947-05-05 | Printing machine or similar machine | |
| IT961904B (en) * | 1971-08-24 | 1973-12-10 | Maschf Augsburg Nuernberg Ag | ELECTRIC PHOTO CONTROL ARRANGEMENT OF THE POSITIONING OF SHEETS IN PRINTING MACHINES |
| DD98083A1 (en) * | 1972-06-27 | 1973-06-12 | ||
| DE2460747A1 (en) * | 1974-12-21 | 1976-07-01 | Maschf Augsburg Nuernberg Ag | Sheet feeding for rotary printing machines - features measuring head with two photo sensors to effect servo motor displacement |
| DE2520232A1 (en) * | 1975-05-07 | 1976-11-18 | Wupa Maschf Gmbh & Co | Paper sheet feed with sideways alignment - transfers sheet from travelling gripper bar onto reciprocating suction table |
| JPS54104166A (en) * | 1978-02-02 | 1979-08-16 | Dainippon Printing Co Ltd | Needle draw fault detector of paper piece printing machine |
| DE3011626A1 (en) * | 1980-03-26 | 1981-10-01 | M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach | DEVICE FOR SIDE ALIGNMENT OF SELF-FEEDING SHEETS ON PRINTING MACHINES |
| DE3015103A1 (en) * | 1980-04-19 | 1981-10-22 | M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach | ROTATIONAL PRINTING MACHINE WITH AT LEAST TWO ARC PACKS ARRANGED IN THE ARCH ORIENTATION |
| FR2512743B1 (en) * | 1981-09-17 | 1986-03-21 | Draperi Christian | SHEET OFFSET MACHINES WITH PNEUMATIC AND ELECTRONIC RECTIFICATION AND MARGIN, AS WELL AS SPECIAL LAYOUT OF THE CYLINDERS ALLOWING THE TRANSFER OF SHEETS PRINTING COMPLETELY COMPLETE |
-
1982
- 1982-05-26 DE DE3219653A patent/DE3219653C1/en not_active Expired
-
1983
- 1983-04-20 CA CA000426315A patent/CA1224966A/en not_active Expired
- 1983-04-23 AT AT83104010T patent/ATE26099T1/en not_active IP Right Cessation
- 1983-04-23 EP EP83104010A patent/EP0095044B1/en not_active Expired
- 1983-05-11 ES ES522299A patent/ES8402794A1/en not_active Expired
- 1983-05-24 FR FR8308516A patent/FR2527577B1/en not_active Expired
- 1983-05-25 IT IT21274/83A patent/IT1194250B/en active
- 1983-05-25 JP JP1983077624U patent/JPS595546U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| IT1194250B (en) | 1988-09-14 |
| JPH0442280Y2 (en) | 1992-10-06 |
| EP0095044B1 (en) | 1987-03-25 |
| DE3219653C1 (en) | 1984-01-26 |
| ES522299A0 (en) | 1984-02-01 |
| ES8402794A1 (en) | 1984-02-01 |
| FR2527577B1 (en) | 1987-02-06 |
| IT8321274A0 (en) | 1983-05-25 |
| ATE26099T1 (en) | 1987-04-15 |
| FR2527577A1 (en) | 1983-12-02 |
| EP0095044A1 (en) | 1983-11-30 |
| JPS595546U (en) | 1984-01-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |