CA2168799A1 - Folding apparatus - Google Patents
Folding apparatusInfo
- Publication number
- CA2168799A1 CA2168799A1 CA 2168799 CA2168799A CA2168799A1 CA 2168799 A1 CA2168799 A1 CA 2168799A1 CA 2168799 CA2168799 CA 2168799 CA 2168799 A CA2168799 A CA 2168799A CA 2168799 A1 CA2168799 A1 CA 2168799A1
- Authority
- CA
- Canada
- Prior art keywords
- sensors
- folded
- folded copy
- folding
- stops
- 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.)
- Abandoned
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
- B65H45/00—Folding thin material
- B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
- B65H45/18—Oscillating or reciprocating blade folders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
- B65H29/68—Reducing the speed of articles as they advance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/40—Type of handling process
- B65H2301/44—Moving, forwarding, guiding material
- B65H2301/449—Features of movement or transforming movement of handled material
- B65H2301/4492—Features of movement or transforming movement of handled material braking
- B65H2301/44921—Features of movement or transforming movement of handled material braking by friction contact with non driven element
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/50—Surface of the elements in contact with the forwarded or guided material
- B65H2404/56—Flexible surface
- B65H2404/561—Bristles, brushes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/10—Size; Dimensions
- B65H2511/17—Deformation, e.g. stretching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/20—Location in space
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
Abstract
A folding apparatus with a braking mechanism having braking brushes which has sensors which measure the deformation of the folded copies. The measured signals are displayed for the information of the operator and/or are fed to a control circuit which obtains control signals therefrom for adjusting the braking arrangements, for positioning the stops and/or for the movement of the folding blade.
Description
21687~9 FOLDING APPARATUS
Field of the Invention The present invention is directed to a folding apparatus with a braking mechanism for braking folded copies whose front edges strike a stop and with a folding blade or folding knife for folding the folded copies.
Background of the Invention A blade type folding apparatus which has brushes for braking the folded copies is known from German Utility Model DE 83 17 604 U. To provide sensitive and defined braking of the copies to be folded in all thicknesses and lengths depending on the speed of the folded copies, the folding apparatus has a braking mechanism with a guide part which is swivelable via a joint and braking brushes which can be lowered onto the surface of the folded copies depending on the thickness, length and speed of the folded copies are fastened to this guide part. Photoelectric sensors are used to measure speed. The signals of these photoelectric sensors can be fed via a microcomputer to an adjusting motor which changes the position of the brushes vertically with respect to the upper surface of the printed copies.
Furthermore, a device for stopping folded products in a folding apparatus is known from German Patent DE 39 03 381 C2. In this device, the stop is resiliently flexible and is deflected in a resilient manner when the folded products strike the stop, i.e., due to the momentum of the folded products. The momentum absorbed by the stop is detected via a sensing device and is used as a regulating variable for regulating the braking force.
21~799 SUMMARY OF THE INVENTION
It is thus an object of the present invention to provide a folding apparatus which includes a braking mechanism of the type mentioned above having braking brushes and by means of which the folded copies are braked with precision in an exact position without damage.
This object is attained by providing a folding apparatus for folding a folded copy having a front edge, which comprises a folding blade for folding the folded copy transverse to the front edge; a stop disposed on each side of the folding blade; a sensor disposed on each side of the folding blade so as to measure at least one of the position and the deformation of the folded copy as it moves towards a stop; means disposed above the folded copy for braking the folded copy as it moves toward a stop; means for adjusting one of the position and the movement of one of the braking means and the folding blade; and control means for controlling one of the position and the movement of one of the braking means and the folding blade with the help of the adjusting means based on one of the position and deformation of the folded copy measured with the sensors. Preferably, the stops are supported so as to be rotatable about pivots depending upon the deformation of the folded copy measured by the sensors for adapting the stops to the position of the front edge of the folded copy. The stops are preferably provided with recesses for receiving a region of the front edge of the folded copy which projects forward due to a waviness of the folded copy caused by the movement of the folded copy towards the stops during the process. The sensors are preferably located in those regions of the stops in which the areas of the folded copy which project forward as a result of the waviness of the folded copy strike the stops. The ~ 1 68799 vertical upthrust of the folded copy is also measured by sensors which are arranged vertically with respect to the direction of movement of the folded copy.
Preferably, the sensors are disposed in the vicinity of the stops and are preferably either optical sensors, pneumatic sensors, acoustic sensors or electric sensors, particularly electric sensors with strain gauges.
The stops are preferably formed to have arc-shaped cross-sections so as to be adapted to the arc-shaped deformation of the front edge of the folded copy.
The braking devices are constructed so as to be rotatable and/or displaceable (arrows A, B, C) corresponding to the signals of the control circuit or sensors. Finally, the measured deformation values are preferably displayed to the operator on a display panel.
Other objects, advantages and features of the invention will be apparent from the following detailed description of the specific examples and embodiments thereof when read in conjunction with the accompanying drawings.
The invention will be explained more fully in the following with reference to the drawings in which:
Fig. 1 is a perspective view of the folding apparatus of the present invention;
Fig. 2 is a side view of the stops; and Fig. 3 is a top view of stops whose shape is adapted to the approaching front edges of the folded copies.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
A folding apparatus 1 (Fig. 1) is used for the production of printed products which, in addition to a 21687~9 first longitudinal fold and a transverse fold, also have a second longitudinal fold which is produced by means of a folding blade 2 or a folding knife. The folding blade 2 cooperates with folding rollers 3 to fold a folded copy 4 in the longitudinal direction.
The folded copy 4 which, for example, is already folded transversely, slides along a conveying path on sliding plates 5, 6. Stops 7, 8 are arranged above the sliding plates 5, 6 at both sides of a recess 20 formed by the two sliding plates 5, 6. The folding blade 2 strikes in a downward direction against the folded copy 4 and through the recess 20 in order to produce the second longitudinal fold between the folding rollers 3. The folded copy 4 is braked via braking arrangements 11, 12 with braking brushes 13.
At least two sensors 9, 10, which may, for example, be optical sensors, are provided on the front side of the stops 7, 8 facing the folded copy 4. These sensors measure the distance from the front edge 40 of the folded copy 4 either continuously or at given time intervals after a determined period of time while the folded copy 4 slides forward. The measured signals are fed to a control circuit, not shown, which determines on the basis of a comparison of the measured distance values whether both halves 40, 41 of the front edge of the folded copy 4 approach the stops 7, 8 at the same rate or whether one of them approaches so as to lag behind the other. In the latter case, e.g., when the right-hand front edge 40 of the folded copy 4 arrives at the stop 8 before the left-hand front edge 41 arrives at the stop 7, the braking arrangement 12 is moved downward farther in the direction of sliding plate 6 in order to brake the right-hand side of the folded copy 4 to a greater extent than the left-hand side and accordingly to compensate for the offset in arrival times. The control circuit with _ 5 _ 2~6~7~9 sensors 9, 10 preferably forms a closed control loop when these sensors 9, 10 send new signals to the control circuit based on the changing arrival time of the front edge 40, 41 so that the control circuit readjusts the braking arrangements 11, 12 in an appropriate manner.
Instead of optical sensors 9, 10, pneumatic or acoustic sensors which measure the impact pressure produced by the front edge 40, 41 of the folded copy 4 can also be utilized.
The sensors 9, 10 are preferably arranged in the vicinity of the recess 20 at the stops 7, 8 because at higher speeds, e.g., at more than 20,000 copies per hour, the folded copies at first only contact the stops 7, 8 in the area close to or in the vicinity of the recess 20 formed by the sliding plates 5, 6 as a result a specific deformation depending on the product. The folded copy 4 is deformed in a wavy manner and certain areas of the front edge 40, 41 dip into the recesses 18 of the stops 7, 8.
The waving of the folded copy 4 is measured by sensors 14, 15 arranged above the folded copy 4. These sensors 14, 15 are optical sensors, for example, which determine the distance from the upper side of the folded copy 4 or are strain gauges which react to a force exerted upon them by the deformation of the upper side of the folded copy 4. The wavy deformation of the folded copy 4 provides a precise measurement for determining whether or not and to what extent the front edge 40, 41 strikes the stops 7, 8 in some regions rather than in others. Since the front edge 40, 41 of the folded copy 4 can become marked or damaged due to a difference in the momentum of impact at the stops 7, 8 in certain locations, only predetermined maximum deformations are permissible if such damage is to be prevented. The sensors 14, 15 therefore transmit the measured values to - 6 _ ~16~799 the control device which generates control signals for changing the position of the braking arrangements 11, 12 when a given maximum value is exceeded. The braking arrangements 11, 12 can preferably be displaced or rotated (arrow C) not only at right angles to the upper surface of the folded copy 4 but also in the transverse directions (arrows A, B).
The sensors 14, 15 are optical sensors, pneumatic sensors, acoustic sensors or force sensors. The latter react to the force exerted upon them by the deformation of the folded copy 4. Strain gauges are preferably used for measuring force. They can measure small forces, e.g., 0.1 N to 10 N, also at a high speed of the folded copies. An elastic measuring finger which is outfitted with a strain gauge is required for this purpose.
The deformation of the folded copies which is measurable via the sensors 14, 15 is a better criterion than a simple measurement of the speed, force or momentum of the folded copy for determining whether or not the folded copies 4 can be damaged when striking the stops 7, 8. For instance, if the measurement signals from the strain gauges in the sensors 14, 15 are superposed by high-frequency oscillations, this suggests that marking can occur at the stops 7, 8. Even though the peak value of the force generated by the deformation lies above a determined limit which is chiefly a function of the nature or quality of the paper material, there is a high probability that marking will occur.
Provided the peak values of the deformation forces measured by the strain gauges in the sensors 14, 15 are approximately equal and lie within minimum and maximum limits, the products 4 can be folded perfectly at right angles and without visible markings. Minimum and maximum limits can be given by the control circuit and the braking arrangements 11, 12 can be adjusted in the _ 7 _ ~1687~9 directions of arrows A, B and C corresponding to the adjusted tolerance limits of the deformation force in order to prevent damage to the front edge 40, 41 of the folded copies 4. Instead of the deformation force, the differential change in the force signal over time can also be measured or derived electronically in the sensors 14, 15.
When the sensors 14, 15 are designed as optical sensors, reflection sensors are preferably used in order to determine the deformation of the folded copies 4. If the sensors 14, 15 are arranged in the immediate vicinity of the stops 7, 8, they can also be constructed as light barriers, wherein a light beam proceeding from a light source situated below or above the upper surface of the folded copy 4 strikes a light detector which is situated, respectively, above or below the folded copy 4, this light detector recording the deformation of the front edge 40, 41 of the folded copy.
The sensors 14, 15 are provided either in combination with the sensors 9, 10 or in place of them.
In another embodiment the sensors 9, 10 are provided in combination with additional sensors 16, 17 at the stops 7, 8. The sensors 16, 17 are either outfitted with strain gauges or are optical or acoustic sensors.
Since the sensors 9, 16, 10, 17 measure the deformation of the front edge of the folded copy 4 on every side 40, 41 of the front edge of the folded copy 4 either optically, e.g., by reflection of the light striking the folded copy 4, or by measuring the tensile forces which act in the direction of the folding blade 2 as a result of the friction between the folded copy 4 and the stops 7, 8, the deformation of the folded copy can be determined by means of sensors 9, 16 on one side and by sensors 10 and 17 on the other side.
The sensors 9, 10, 16, 17 are arranged either on 216~7~
the side wall of the stops 7, 8 themselves which faces the front edges 40, 41 or in recesses 18 (Fig. 2) which are preferably provided in the stops 7, 8. The recesses 18 are so distributed that they are situated in those regions in which the front edges 40, 41 of the folded copies 4 have deformations projecting forward as a result of the waviness.
Further, the stops 7, 8 (Fig. 3) can be circular or arc shaped so as to better adapt the stops to the anticipated deformation of the front edges 40, 41 of the folded copies 4.
In another embodiment of the present invention and based on the signals measured by the sensors 9, 10 and/or 14, 15 and/or 16, 17, the stops 7, 8 can be adjusted about pivots (Fig. 1) so as to improve the stopping of the folded copies 4 and prevent the marking thereof.
The deformations at the folded copy 4 which are measured by the sensors 9, 10, 14, 15, 16, 17 are also utilized as controlling variables or regulating variables for controlling and regulating the movement of the folding blade 2.
In a preferred embodiment of the invention, some or all of the signals measured by the sensors 9, 10, 14, 15, 16, 17 are displayed on a display panel 46 for use by the operator to derive corrections to the adjustments for the folding blade 2, braking brushes 13 or stops 6 and 7.
The present invention provides a folding apparatus 1 with a braking mechanism 11, 12 having braking brushes 13 and sensors 9, 10, 14, 15, 16, 17 which measure the deformation of folded copies 4. The measured signals are fed to a control circuit which obtains control signals therefrom for adjusting the braking arrangements 11, 12, for positioning the stops 7, 8 and/or for the movement of the folding blade 2.
- 9 21~799 It should be understood that the preferred embodiments and examples described above are for illustration purposes only and are not to be construed as limiting the scope of the invention which is properly delineated in the appended claims.
Field of the Invention The present invention is directed to a folding apparatus with a braking mechanism for braking folded copies whose front edges strike a stop and with a folding blade or folding knife for folding the folded copies.
Background of the Invention A blade type folding apparatus which has brushes for braking the folded copies is known from German Utility Model DE 83 17 604 U. To provide sensitive and defined braking of the copies to be folded in all thicknesses and lengths depending on the speed of the folded copies, the folding apparatus has a braking mechanism with a guide part which is swivelable via a joint and braking brushes which can be lowered onto the surface of the folded copies depending on the thickness, length and speed of the folded copies are fastened to this guide part. Photoelectric sensors are used to measure speed. The signals of these photoelectric sensors can be fed via a microcomputer to an adjusting motor which changes the position of the brushes vertically with respect to the upper surface of the printed copies.
Furthermore, a device for stopping folded products in a folding apparatus is known from German Patent DE 39 03 381 C2. In this device, the stop is resiliently flexible and is deflected in a resilient manner when the folded products strike the stop, i.e., due to the momentum of the folded products. The momentum absorbed by the stop is detected via a sensing device and is used as a regulating variable for regulating the braking force.
21~799 SUMMARY OF THE INVENTION
It is thus an object of the present invention to provide a folding apparatus which includes a braking mechanism of the type mentioned above having braking brushes and by means of which the folded copies are braked with precision in an exact position without damage.
This object is attained by providing a folding apparatus for folding a folded copy having a front edge, which comprises a folding blade for folding the folded copy transverse to the front edge; a stop disposed on each side of the folding blade; a sensor disposed on each side of the folding blade so as to measure at least one of the position and the deformation of the folded copy as it moves towards a stop; means disposed above the folded copy for braking the folded copy as it moves toward a stop; means for adjusting one of the position and the movement of one of the braking means and the folding blade; and control means for controlling one of the position and the movement of one of the braking means and the folding blade with the help of the adjusting means based on one of the position and deformation of the folded copy measured with the sensors. Preferably, the stops are supported so as to be rotatable about pivots depending upon the deformation of the folded copy measured by the sensors for adapting the stops to the position of the front edge of the folded copy. The stops are preferably provided with recesses for receiving a region of the front edge of the folded copy which projects forward due to a waviness of the folded copy caused by the movement of the folded copy towards the stops during the process. The sensors are preferably located in those regions of the stops in which the areas of the folded copy which project forward as a result of the waviness of the folded copy strike the stops. The ~ 1 68799 vertical upthrust of the folded copy is also measured by sensors which are arranged vertically with respect to the direction of movement of the folded copy.
Preferably, the sensors are disposed in the vicinity of the stops and are preferably either optical sensors, pneumatic sensors, acoustic sensors or electric sensors, particularly electric sensors with strain gauges.
The stops are preferably formed to have arc-shaped cross-sections so as to be adapted to the arc-shaped deformation of the front edge of the folded copy.
The braking devices are constructed so as to be rotatable and/or displaceable (arrows A, B, C) corresponding to the signals of the control circuit or sensors. Finally, the measured deformation values are preferably displayed to the operator on a display panel.
Other objects, advantages and features of the invention will be apparent from the following detailed description of the specific examples and embodiments thereof when read in conjunction with the accompanying drawings.
The invention will be explained more fully in the following with reference to the drawings in which:
Fig. 1 is a perspective view of the folding apparatus of the present invention;
Fig. 2 is a side view of the stops; and Fig. 3 is a top view of stops whose shape is adapted to the approaching front edges of the folded copies.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
A folding apparatus 1 (Fig. 1) is used for the production of printed products which, in addition to a 21687~9 first longitudinal fold and a transverse fold, also have a second longitudinal fold which is produced by means of a folding blade 2 or a folding knife. The folding blade 2 cooperates with folding rollers 3 to fold a folded copy 4 in the longitudinal direction.
The folded copy 4 which, for example, is already folded transversely, slides along a conveying path on sliding plates 5, 6. Stops 7, 8 are arranged above the sliding plates 5, 6 at both sides of a recess 20 formed by the two sliding plates 5, 6. The folding blade 2 strikes in a downward direction against the folded copy 4 and through the recess 20 in order to produce the second longitudinal fold between the folding rollers 3. The folded copy 4 is braked via braking arrangements 11, 12 with braking brushes 13.
At least two sensors 9, 10, which may, for example, be optical sensors, are provided on the front side of the stops 7, 8 facing the folded copy 4. These sensors measure the distance from the front edge 40 of the folded copy 4 either continuously or at given time intervals after a determined period of time while the folded copy 4 slides forward. The measured signals are fed to a control circuit, not shown, which determines on the basis of a comparison of the measured distance values whether both halves 40, 41 of the front edge of the folded copy 4 approach the stops 7, 8 at the same rate or whether one of them approaches so as to lag behind the other. In the latter case, e.g., when the right-hand front edge 40 of the folded copy 4 arrives at the stop 8 before the left-hand front edge 41 arrives at the stop 7, the braking arrangement 12 is moved downward farther in the direction of sliding plate 6 in order to brake the right-hand side of the folded copy 4 to a greater extent than the left-hand side and accordingly to compensate for the offset in arrival times. The control circuit with _ 5 _ 2~6~7~9 sensors 9, 10 preferably forms a closed control loop when these sensors 9, 10 send new signals to the control circuit based on the changing arrival time of the front edge 40, 41 so that the control circuit readjusts the braking arrangements 11, 12 in an appropriate manner.
Instead of optical sensors 9, 10, pneumatic or acoustic sensors which measure the impact pressure produced by the front edge 40, 41 of the folded copy 4 can also be utilized.
The sensors 9, 10 are preferably arranged in the vicinity of the recess 20 at the stops 7, 8 because at higher speeds, e.g., at more than 20,000 copies per hour, the folded copies at first only contact the stops 7, 8 in the area close to or in the vicinity of the recess 20 formed by the sliding plates 5, 6 as a result a specific deformation depending on the product. The folded copy 4 is deformed in a wavy manner and certain areas of the front edge 40, 41 dip into the recesses 18 of the stops 7, 8.
The waving of the folded copy 4 is measured by sensors 14, 15 arranged above the folded copy 4. These sensors 14, 15 are optical sensors, for example, which determine the distance from the upper side of the folded copy 4 or are strain gauges which react to a force exerted upon them by the deformation of the upper side of the folded copy 4. The wavy deformation of the folded copy 4 provides a precise measurement for determining whether or not and to what extent the front edge 40, 41 strikes the stops 7, 8 in some regions rather than in others. Since the front edge 40, 41 of the folded copy 4 can become marked or damaged due to a difference in the momentum of impact at the stops 7, 8 in certain locations, only predetermined maximum deformations are permissible if such damage is to be prevented. The sensors 14, 15 therefore transmit the measured values to - 6 _ ~16~799 the control device which generates control signals for changing the position of the braking arrangements 11, 12 when a given maximum value is exceeded. The braking arrangements 11, 12 can preferably be displaced or rotated (arrow C) not only at right angles to the upper surface of the folded copy 4 but also in the transverse directions (arrows A, B).
The sensors 14, 15 are optical sensors, pneumatic sensors, acoustic sensors or force sensors. The latter react to the force exerted upon them by the deformation of the folded copy 4. Strain gauges are preferably used for measuring force. They can measure small forces, e.g., 0.1 N to 10 N, also at a high speed of the folded copies. An elastic measuring finger which is outfitted with a strain gauge is required for this purpose.
The deformation of the folded copies which is measurable via the sensors 14, 15 is a better criterion than a simple measurement of the speed, force or momentum of the folded copy for determining whether or not the folded copies 4 can be damaged when striking the stops 7, 8. For instance, if the measurement signals from the strain gauges in the sensors 14, 15 are superposed by high-frequency oscillations, this suggests that marking can occur at the stops 7, 8. Even though the peak value of the force generated by the deformation lies above a determined limit which is chiefly a function of the nature or quality of the paper material, there is a high probability that marking will occur.
Provided the peak values of the deformation forces measured by the strain gauges in the sensors 14, 15 are approximately equal and lie within minimum and maximum limits, the products 4 can be folded perfectly at right angles and without visible markings. Minimum and maximum limits can be given by the control circuit and the braking arrangements 11, 12 can be adjusted in the _ 7 _ ~1687~9 directions of arrows A, B and C corresponding to the adjusted tolerance limits of the deformation force in order to prevent damage to the front edge 40, 41 of the folded copies 4. Instead of the deformation force, the differential change in the force signal over time can also be measured or derived electronically in the sensors 14, 15.
When the sensors 14, 15 are designed as optical sensors, reflection sensors are preferably used in order to determine the deformation of the folded copies 4. If the sensors 14, 15 are arranged in the immediate vicinity of the stops 7, 8, they can also be constructed as light barriers, wherein a light beam proceeding from a light source situated below or above the upper surface of the folded copy 4 strikes a light detector which is situated, respectively, above or below the folded copy 4, this light detector recording the deformation of the front edge 40, 41 of the folded copy.
The sensors 14, 15 are provided either in combination with the sensors 9, 10 or in place of them.
In another embodiment the sensors 9, 10 are provided in combination with additional sensors 16, 17 at the stops 7, 8. The sensors 16, 17 are either outfitted with strain gauges or are optical or acoustic sensors.
Since the sensors 9, 16, 10, 17 measure the deformation of the front edge of the folded copy 4 on every side 40, 41 of the front edge of the folded copy 4 either optically, e.g., by reflection of the light striking the folded copy 4, or by measuring the tensile forces which act in the direction of the folding blade 2 as a result of the friction between the folded copy 4 and the stops 7, 8, the deformation of the folded copy can be determined by means of sensors 9, 16 on one side and by sensors 10 and 17 on the other side.
The sensors 9, 10, 16, 17 are arranged either on 216~7~
the side wall of the stops 7, 8 themselves which faces the front edges 40, 41 or in recesses 18 (Fig. 2) which are preferably provided in the stops 7, 8. The recesses 18 are so distributed that they are situated in those regions in which the front edges 40, 41 of the folded copies 4 have deformations projecting forward as a result of the waviness.
Further, the stops 7, 8 (Fig. 3) can be circular or arc shaped so as to better adapt the stops to the anticipated deformation of the front edges 40, 41 of the folded copies 4.
In another embodiment of the present invention and based on the signals measured by the sensors 9, 10 and/or 14, 15 and/or 16, 17, the stops 7, 8 can be adjusted about pivots (Fig. 1) so as to improve the stopping of the folded copies 4 and prevent the marking thereof.
The deformations at the folded copy 4 which are measured by the sensors 9, 10, 14, 15, 16, 17 are also utilized as controlling variables or regulating variables for controlling and regulating the movement of the folding blade 2.
In a preferred embodiment of the invention, some or all of the signals measured by the sensors 9, 10, 14, 15, 16, 17 are displayed on a display panel 46 for use by the operator to derive corrections to the adjustments for the folding blade 2, braking brushes 13 or stops 6 and 7.
The present invention provides a folding apparatus 1 with a braking mechanism 11, 12 having braking brushes 13 and sensors 9, 10, 14, 15, 16, 17 which measure the deformation of folded copies 4. The measured signals are fed to a control circuit which obtains control signals therefrom for adjusting the braking arrangements 11, 12, for positioning the stops 7, 8 and/or for the movement of the folding blade 2.
- 9 21~799 It should be understood that the preferred embodiments and examples described above are for illustration purposes only and are not to be construed as limiting the scope of the invention which is properly delineated in the appended claims.
Claims (11)
1. A folding apparatus for folding a folded copy having a front edge, comprising:
- a folding blade for folding the folded copy transverse to the front edge;
- a stop disposed on each side of the folding blade;
- a sensor disposed on each side of the folding blade so as to measure at least one of the position and the deformation of the folded copy as it moves toward a stop;
- means disposed above the folded copy for braking the folded copy as it moves toward a stop;
- means for adjusting one of the position and the movement of one of the braking means and the folding blade; and - control means for controlling one of the position and the movement of one of the braking means and the folding blade with the adjusting means based on one of the position and deformation of the folded copy measured with the sensors.
- a folding blade for folding the folded copy transverse to the front edge;
- a stop disposed on each side of the folding blade;
- a sensor disposed on each side of the folding blade so as to measure at least one of the position and the deformation of the folded copy as it moves toward a stop;
- means disposed above the folded copy for braking the folded copy as it moves toward a stop;
- means for adjusting one of the position and the movement of one of the braking means and the folding blade; and - control means for controlling one of the position and the movement of one of the braking means and the folding blade with the adjusting means based on one of the position and deformation of the folded copy measured with the sensors.
2. The folding apparatus according to claim 1, wherein the stops are supported so as to be rotatable about pivots depending on the deformation of the folded copy measured by the sensors for adapting the stops to the position of the front edge of the folded copy.
3. The folding apparatus according to claim 1, wherein the stops have recesses for receiving a region of the front edge of the folded copy which projects forward due to a waviness of the folded copy caused by the motion thereof.
4. The folding apparatus according to claim 3, wherein the sensors are located in those regions of the stops in which the areas of the folded copy which project forward as a result of the waviness of the folded copy strike the stops.
5. The folding apparatus according to claim 1, wherein the sensors measure the vertical upthrust of the folded copy and are arranged vertically with respect to a direction of movement of the folded copy.
6. The folding apparatus according to claim 5, wherein the sensors are disposed in the vicinity of the stops.
7. The folding apparatus according to claim 1, wherein the sensors are selected from the group consisting of optical sensors, pneumatic sensors, acoustic sensors and electric sensors.
8. The folding apparatus according to claim 7, wherein the electric sensor includes a strain gauge.
9. The folding apparatus according to claim 1, wherein the stops have an arc-shaped cross section so as to be adapted to the arc-shaped deformation of the front edge of the folded copy.
10. The folding apparatus according to claim 1, wherein the braking means is arranged so as to be at least one of rotatable and displaceable in response to the measurement of the sensors.
11. The folding apparatus according to claim 1, additionally comprising a display for displaying the measured deformation values.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1995104769 DE19504769A1 (en) | 1995-02-14 | 1995-02-14 | High speed paper-folding station for printed material e.g. books |
| DE19504769.9 | 1995-02-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2168799A1 true CA2168799A1 (en) | 1996-08-15 |
Family
ID=7753850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2168799 Abandoned CA2168799A1 (en) | 1995-02-14 | 1996-02-05 | Folding apparatus |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH08245064A (en) |
| CA (1) | CA2168799A1 (en) |
| DE (1) | DE19504769A1 (en) |
| FR (1) | FR2730480B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8251882B2 (en) | 2009-03-27 | 2012-08-28 | Koenig & Bauer Aktiengesellschaft | Method for operating a longitudinal folding apparatus having a folding blade and a folding table, and longitudinal folding apparatus |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20307172U1 (en) | 2003-05-08 | 2003-07-10 | Maschinenbau Oppenweiler Binder GmbH & Co. KG, 71570 Oppenweiler | A knife |
| US7416177B2 (en) | 2004-09-16 | 2008-08-26 | Ricoh Company, Ltd. | Sheet folding apparatus, sheet processing apparatus and image forming apparatus |
| DE102007032911B4 (en) | 2007-07-14 | 2010-02-04 | Koenig & Bauer Aktiengesellschaft | Method for operating a longitudinal folding apparatus |
| DE102011119423A1 (en) * | 2010-12-22 | 2012-06-28 | Heidelberger Druckmaschinen Ag | Forward edge stop for use in arc folding machine for deceleration and aligning of arc, has abutting surfaces aligned vertical to transport direction in two planes, respectively, where edge stop is formed by plate |
| JP6237247B2 (en) * | 2014-01-15 | 2017-11-29 | 凸版印刷株式会社 | Chopper folding device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8317604U1 (en) * | 1983-06-16 | 1984-07-12 | M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach | Braking device in a folder |
| FR2563773B1 (en) * | 1984-05-07 | 1986-12-05 | Marinoni Harris Sa | DEVICE FOR AUTOMATICALLY ADJUSTING THE SLOWDOWN OF THE NOTEBOOK BEFORE FOLDING IN THE FOLDERS OF THE PRESS FOLDER SQUARES |
| DE3903381A1 (en) * | 1989-02-04 | 1990-08-09 | Frankenthal Ag Albert | DEVICE FOR STOPPING FOLDED PRODUCTS |
| JP2801744B2 (en) * | 1990-06-19 | 1998-09-21 | 株式会社小森コーポレーション | Automatic chopper blade operation timing control method and apparatus |
| JPH05270731A (en) * | 1992-03-30 | 1993-10-19 | Dainippon Ink & Chem Inc | Control device for folding brush of folding machine |
| JP3404079B2 (en) * | 1993-07-27 | 2003-05-06 | 株式会社小森コーポレーション | Chopper folding device for folder |
-
1995
- 1995-02-14 DE DE1995104769 patent/DE19504769A1/en not_active Withdrawn
-
1996
- 1996-02-05 CA CA 2168799 patent/CA2168799A1/en not_active Abandoned
- 1996-02-13 JP JP8025488A patent/JPH08245064A/en active Pending
- 1996-02-13 FR FR9601729A patent/FR2730480B1/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8251882B2 (en) | 2009-03-27 | 2012-08-28 | Koenig & Bauer Aktiengesellschaft | Method for operating a longitudinal folding apparatus having a folding blade and a folding table, and longitudinal folding apparatus |
| US8323162B2 (en) | 2009-03-27 | 2012-12-04 | Koenig & Bauer Aktiengesellschaft | Method for correcting a skewed position of a product exiting a folding roller gap between two folding rollers of a longitudinal folding apparatus, and a longitudinal folding apparatus |
| CN102365223B (en) * | 2009-03-27 | 2015-07-15 | 柯尼格及包尔公开股份有限公司 | Method for correcting an inclined position of a product to be folded on a folding table of a longitudinal folding machine and such a longitudinal folding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2730480A1 (en) | 1996-08-14 |
| JPH08245064A (en) | 1996-09-24 |
| DE19504769A1 (en) | 1996-08-22 |
| FR2730480B1 (en) | 1998-04-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |