EP0095912B1 - Klingenhalter - Google Patents
Klingenhalter Download PDFInfo
- Publication number
- EP0095912B1 EP0095912B1 EP83303078A EP83303078A EP0095912B1 EP 0095912 B1 EP0095912 B1 EP 0095912B1 EP 83303078 A EP83303078 A EP 83303078A EP 83303078 A EP83303078 A EP 83303078A EP 0095912 B1 EP0095912 B1 EP 0095912B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- recess
- wedge
- members
- holding device
- 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
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/56—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter
- B26D1/62—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is rotating about an axis parallel to the line of cut, e.g. mounted on a rotary cylinder
- B26D1/626—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is rotating about an axis parallel to the line of cut, e.g. mounted on a rotary cylinder for thin material, e.g. for sheets, strips or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
- B26D7/2614—Means for mounting the cutting member
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F13/00—Common details of rotary presses or machines
- B41F13/54—Auxiliary folding, cutting, collecting or depositing of sheets or webs
- B41F13/56—Folding or cutting
- B41F13/60—Folding or cutting crosswise
Definitions
- the present invention relates to a device for mounting and accurately seating a perforating or cutoff blade along a cylinder such as might be used for partially or completely severing a web at a plurality of locations along its length.
- Such devices are particularly useful in machines for continuous printing or collating of paper webs.
- the blade be capable of removal, replacement and/or repositioning along the rotating blade cylinder. From time to time during the operation of the machine, it is necessary to remove the blade from the cylinder, for instance, when it may be desired to print a web without perforating or severing the same, or when replacement of the blade is necessary due to dulling or breakage of the blade.
- a second requirement for such blade mounting arrangements is that the cutting edge of a perforating blade be capable of accurate seating against an anvil surface. Otherwise, an uneven perforation will result, with some sections of the perforation being too deep, or some sections being too shallow, or both. This produces variation in the tear strength along the perforation, with resultant high probability of jamming in subsequent printers or bursters.
- a backup or anvil cylinder may be included for providing a hardened anvil surface, or insert, or in some cases a die, to cooperate with the sharpened edge of the properly seated blade in perforating the passing web as the web moves between the rotating blade cylinder and anvil or backup cylinder.
- the blade is mounted to the rotating cylinder by clamping the blade into a recess or slot cut generally lengthwise into the cylinder periphery.
- the recess is rectangular in cross section, and the blade may be clamped against one of the side faces of the recess, or against an intermediate supporting bar.
- Several techniques are available, however, for providing proper seating of the cutting edge of the blade against the anvil surface.
- a perforating blade when manufactured, it includes some variation in height from its base to its cutting edge, as well as a tendency to bow in a lateral direction.
- One method for seating the blade is to use a blade which has been manufactured to very close tolerances with respect to both height and bow.
- the cylinder is provided with a recess that has been machined also to very close tolerances with respect to a uniform and specific depth.
- Seating of the blade is relatively simple, since the blade is loaded into the recess, with the base of the blade bottomed along the base of the recess, and is then clamped tightly in place.
- a second technique in which a blade having very loose height and bow tolerance may be used.
- the blade is inserted into the recess, but is not bottomed against the base of the recess, and is secured somewhat loosely along its length.
- the blade is then seated against the anvil surface, through a procedure known as "crash in”.
- This procedure consists of rotating the blade cylinder and anvil cylinder, with or without a web passing therebetween at inching speed through one revolution.
- the cutting edge of the blade is free to move under the seating force sufficiently into the recess, at whatever locations are necessary to obtain a uniform seating of the cutting edge against the anvil. While secured somewhat loosely, the blade must be nonetheless held tight enough to hold its seated position.
- the apparatus is then stopped and the blade is securely clamped along its entire length to prevent slip within the recess when the apparatus is operated at higher speeds.
- a third technique possessing some of the advantages and disadvantages of both techniques, utilizes a blade having close tolerance with respect to height only. While the blade is bottomed against the recess base, crash-in is required to remove vertical bow from the blade.
- a number of various devices for accurately securing a blade within a recess, suitable for holding the blade both for crash-in and for clamping are known.
- the blade may be placed against a side wall of the recess, and a bar inserted into the recess adjacent the blade.
- a plurality of bolt members are threaded into holes in the bar, extending from the side of the bar to the recess side wall opposite the blade.
- the bolt members are driven in a direction outwardly from the bar against the recess wall.
- Driving of the bolt members forces the bar tightly against the blade, thereby clamping it in place.
- the bolt members may be partially tightened, allowing the blade limited movement for seating against the anvil surface during crash-in, and then the bolt members may be completely tightened for clamping.
- a blade holding device in which a wedge bar is provided for clamping the blade into the cylinder recess.
- the blade is placed against a side wall of the recess, and the wedge bar is provided with a vertical taper, i.e., in a radial direction with respect to the cylinder.
- a non-rectangular cross-sectional recess may be provided, or an intermediate member placed between the blade and the wedge bar and having a taper opposite the wedge bar may be provided, along with a plurality of bolts extending through the wedge bar and into the cylinder at the bottom of the recess.
- the wedge bar By driving the bolts, the wedge bar is forced into the recess in a direction toward the axis of the cylinder, thereby securely clamping the blade into the recess.
- Preloading springs may be provided to act on the wedge bar with a force sufficient to retain the blade during crash-in while allowing limited movement of the blade within the recess for seating. Following seating, the bolts are tightened to firmly secure the blade.
- the Schriber et al device By providing the preloading springs for supplying sufficient clamping force for seating of the blade, the Schriber et al device eliminates the need for the operator to manipulate the bolts during the crash in process. Additionally, by providing bolts that are driven radially with respect to the cylinder, rather than disposed within the-recess, access to the bolts is facilitated. Nonetheless, the Schriber et al device utilizes a plurality of bolts to provide a relatively uniform clamping force on the blade. Moreover, since the bolts are disposed along the entire length of the wedge bar, the operator must reach along the full length of the cylinder during the clamping process. Thus, even with the Schriber et al blade holding device, the clamping process is both time-consuming and awkward to perform.
- Each bolt extends into a threaded bore in an end of one of the wedge bars, such that by rotating the bolts, each bar may be moved in either direction along the cylinder recess.
- the bolts are rotated such that the wedge bars are driven into the recess so as to wedge the blade into place.
- Notches or other indicia are provided along the upper surface of one of the wedge bars and the cylinder surface, so that the relative movement of the bar in relation to the cylinder for aligning the blade may be easily determined.
- the Richards et al device reduces the number of bolts which must be manipulated during the clamping process in comparison with the devices described above. It is indicated in the patent, however, that the primary purpose of the device is to enable the angle of the blade with respect to the direction of travel of the web to be somewhat adjustable, although the device seems better suited for adjusting the distance from the blade along the cylinder periphery to a next following blade. In either case, while such a feature may be desirable in compensating for an improperly machined cylinder and/or associated gears, it requires the operator of the device during the clamping process to ensure that the blade is mounted either precisely perpendicular to the web, or precisely to the required spacing from perforation to perforation or from separation to separation.
- the Richards et al patent does not address the problem of holding the blade for seating during crash-in, and in fact, shows the blade bottomed on the recess base.
- the Richards device possesses several disadvantages that make it impractical for use with a blade that must be seated for uniform perforation.
- US-A-3793918 which is considered to represent the closest known prior art, discloses another blade holding device comprising a multiplicity of clamp rollers distributed along the recess with their axes disposed radially of the cylinder.
- the rollers are loose and shiftable transversely and longitudinally in the recess, and are disposed in two longitudinal rows with the peripheries of the rollers in one row projecting between and contacting the peripheries of the rollers in the other row.
- By applying a compressive force to the rollers longitudinally of the recess the two rows are cammed apart transversely, thereby to exert a clamping force on the blade at a plurality of locations along the length thereof.
- the device Whilst the device is claimed to be capable of quickly, accurately and uniformly clamping the blade in its operative position, it possesses the previously described disadvantage that there is only a relatively narrow clamping force range which is suitable for crash-in wherein the blade is held loosely enough for movement during seating but tight enough to retain the seated position.
- a blade holding device for use with a cylinder in which the blade may be clamped in a relatively quick and simple manner.
- Such a device should require manipulation of few parts during the clamping operation, and should not require the use of any special tools or special skills on the part of the operator.
- the device should enable the blade to be secured loosely into the cylinder with uniform securing force, properly seated against an anvil surface, and then tightly clamped into place. Clamping force should be uniformly applied along the length of the blade.
- the device should be relatively simple to manufacture, and should not require unreasonably tight manufacturing tolerances.
- a blade holding device for use with a blade and a rotatable cylinder, the cylinder having a longitudinal recess defined in the periphery thereof parallel to the axis of the cylinder, members fittable within the recess with adjacent faces in mutual contact, such that the blade is disposed between the members and a waU of the recess, and means for performing relative movement of the members whereby the blade is clamped between the members and the recess wall, characterized in that:
- the retaining force-increasing means includes at least one spring member disposed adjacent the outer face of the first wedge member between the wedge member and the blade.
- a plurality of spring members may be provided in the form of Belleville disc springs, although a spring member in the form of a corrugated metal strip or elastomeric strip may alternatively be used.
- the disc springs may be held in relative positions, and the holding means may be a strip constructed of a resilient material having a plurality of holes along the length thereof. The disc springs are mounted one each within each hole.
- the first wedge member includes a relatively shallow channel defined along the length of its outer face, so that the resilient strip may be mounted along the channel, whereby the disc springs may abut the blade, for example, perforating blade, when the blade and first wedge member are inserted into the recess of the cylinder.
- the spring members provide a wide range for relative positioning of the wedge members for crash-in. Because the range of holding force exerted upon the blade for proper seating is relatively narrow, the spring members make application of the proper force easier, faster, and more precise than in previously known devices.
- the spring members also allow a wider range of tolerance for the recess or slot width, wedge member width and blade thickness, and produce more uniform crash-in force along the entire length of the blade.
- the relative movement of the wedge members within the cylinder recess may be performed by providing an end member mounted to one end of the cylinder adjacent the recess.
- the end member includes an opening therein, through which a bolt is extended.
- the bolt has at least one flange near its head, the flange being disposed on one side of the opening for retaining the bolt in a position relative to the end member.
- the bolt is further engageable with one of the wedge members, so that by rotating the bolt, the wedge member. may be move relative to the cylinder, and hence relative to the other wedge member.
- the bolt may be engageable with an end of the second wedge member, and the relative movement of the wedge members is performed by moving the second wedge member along the recess.
- the first wedge member is captured between two end rings to prevent its movement along the recess. Additionally, at least a portion of the outer face of the first wedge member is roughened to increase the holding force on the blade or to prevent slippage of the blade within the recess.
- Fig. 1 shows a portion of a typical rotary cutter cylinder 10 to which may be mounted a blade 12 of any length up to and including the length of the cylinders.
- Blade 12 is shown as a perforating blade, but alternatively may be a cutoff blade.
- the cylinder 10 includes a longitudinal recess 14 defined along the periphery of cylinder 10.
- Recess 14 is preferably rectangular is cross-section, and as seen in Fig. 6, includes a base 15 and opposed walls 16 and 18.
- blade 12 may be inserted into recess 14 of cylinder 10 for mounting, although blade 12 is not bottomed against base 15, allowing space both for crash-in and storage of blade 12 when not in use. Blade 12 is held in position by the blade holding device 20 embodying the present invention.
- Blade holding device 20 includes a pair of wedge members 22 and 24.
- Each wedge member 22 and 24 has an inner wedge face 23 and 25, respectively, and an outer face 26 and 27, respectively.
- wedge members 22 and 24 are tapered in a direction longitudinally along the recess 14. Further, wedge members 22 and 24 are insertable into recess 14 of cylinder 10 with wedge faces 23 and 25 in mutual contact, such that the blade 12 may be held between outer face 26 of wedge member 22 and wall 16 of recess 14. Wedge member 24 is moved relative to wedge member 22, applying a wedging force against both walls 16 and 18 of recess 14, thereby clamping blade 12 into position.
- Wedge member 24 is provided with a threaded bore 28 in one end thereof.
- Bolt 29, engageable with bore 28 includes a head 30 and a pair of flanges 32 and 34.
- An annular collar 36 attached to one end of cylinder 10 by a plurality of bolts 38 includes notch 40, communicating with recess 14 of cylinder 10.
- Notch 40 of collar 36 includes a relatively shallow portion 42 having a groove 44 defined therein.
- a retaining member 46 having a groove 48, is mounted to relatively shallow portion 42 by a pair of bolts 50.
- Grooves 44 and 48 cooperate to define a hole, and bolt 29 is fittable within the hole such that flanges 32 and 34 are disposed on each side of the hole.
- Grooves 44 and 48 are sized accordingly such that flanges 32 and 34 retain bolt 29 within the hole but bolt 29 is freely rotatable within the hole.
- bolt 29 may have a single flange, with the single flange and bolt head 30 cooperating at opposite ends of grooves 44 and 48 for retention of bolt 29 within the hole defined by grooves 44 and 48.
- FIG. 3 illustrates the wedge members 22 and 24 wedged into recess 14 of cylinder 10 such that blade 12 is securely held between outer face 26 of wedge member 22 and wall 16 of slot 14.
- head 30 of bolt 29 is gripped by an appropriate tool (not shown) and bolt 29 is rotated in the direction indicated by arrow 52 in Fig. 4.
- bolt 29 and bore 28 are provided with left-handed threads, and bolt 29 may have multiple start threads for faster movement of bolt 29 along bore 28, and hence, faster operation of the blade holding device 20.
- wedge member 24 By rotating within threaded bore 28 of wedge member 24, bolt 29 draws wedge member 24 in a direction toward collar 36, as indicated by arrow 53. As wedge member 24 is drawn toward collar 36, wedge members 22 and 24 no longer apply wedging force to the walls of recess 14, and blade 12 is released and may be removed.
- wedge member 22 remains stationary within recess 14, retained by collar 36 and an annular end ring 54 mounted to the opposite end of cylinder 10 from collar 36.
- each wedge member is provided with marks, notches or other indicia 55 to present a visual indication of their relative movement.
- any appropriate solid lubricant may be applied to the wedge face 25 and outer face 27 of wedge member 24.
- a relatively shallow channel 56 is defined along the length of the outer face 26 of wedge member 22, as seen in Fig. 1.
- a plurality of Belleville disc springs 58 are disposed along channel 56, and are held in relative position by a rubber strip 60.
- Rubber strip 60 includes a plurality of holes defined along its length, such that each spring 58 may be mounted within one of the holes and retained thereby. Springs 58 may be held into the holes of strip 60 either by cementing them in place, such as with a rubber cement, or molding the strip 60 about the springs 58 so that they are retained in place. Strip 60 is preferably mounted to channel 56 by a rubber cement material.
- Surfaces 61 may be roughened or knurled to provide increased holding force, by friction, for the blade 12 to prevent its slippage within recess 14.
- springs 58 for providing relative ease in positioning wedge member 24 for crash-in of blade 12 may be seen by referring to Fig. 5, showing a plot of the load (force per unit length) placed upon the blade 12 by the blade holding device 20 as a function of the displacement of wedge member 24 along recess 14, and as a function of the compression of wedge members 22 and 24 and springs 58 across recess 14.
- the values presented along the load axis of Fig. 5 are pertinentto blades and blade holding devices in general, independent of their length, and values presented along the compression axis are similarly independent of the angle formed between the wedge face 25 and outer face 27 of the wedge member 24.
- Values presented along the displacement axis of Fig. 5, however, are dependent upon the wedge member angle, and specific values in Fig. 5 are based upon an exemplary angle of 1°. It will be nonetheless understood that the shapes and relationships of the curves presented are correct for any angle.
- springs 58 When springs 58 are provided as illustrated generally in Fig. 1, the displacement of wedge member 24 produces the load values indicated by curve 70 in Fig. 5. Initially, only springs 58 actually contact blade 12, as seen in Fig. 7, and as wedge member 24 is moved, springs 58 compress against blade 12. Springs 58 have a significantly lower force constant (or, more properly here, a spring constant), approximately 6679 Kg/cm 2 (95,000 Ibs./in 2 ), than wedge members 22 and 24, and the initial portion of curve 70, indicated at 72, has a proportionately reduced slope.
- portion 76 of curve 70 After springs 58 are compressed such that surfaces 61 of wedge member 22 contact blade 12, further displacement of wedge member 24 causes the load to increase as shown by portion 76 of curve 70. Since portion 76 has a significantly increased slope compared to portion 72, relatively little additional displacement is necessary to apply the final clamping load to blade 12.
- a number of alternative embodiments for the spring members may be used in place of springs 58 and rubber strip 60, each having the same operation as the embodiment just disclosed and producing a load-displacement curve of the same shape as curve 70.
- a single corrugated metal strip 78 is provided, fittable within channel 56 of wedge member 22.
- a continuous elastomeric strip 80 is used, mounted to channel 56 by a rubber cement material.
- a series of slightly compressible rollers or balls may be placed between the wedge members 22 and 24.
- spring members may be used that are characterized by a non-linear compression-load relationship. Such an embodiment will produce a curve somewhat different from curve 70, in that the portion corresponding to portion 72 will not be linear, but will nontheless result in expansion of the compression and displacement ranges for crash-in, thereby obtaining the same advantages.
- Ring 54 is attached to cylinder 10 by a plurality of screws 86 (only one shown) and is of a radial width less than the depth of recess 14.
- a retaining pin 88 is mounted near the lower end of each of wedge members 22 and 24, such that when wedge members 22 and 24 are inserted into recess 14, retaining pins 88 extend from recess 14 under the ring 54.
- retaining pins 88 cooperate with ring 54 to hold the wedge members in place.
- a similar retaining pin 88 is provided at the opposite end of wedge member 22, and is inserted into a half-slot (not shown) defined within collar 36. It will be seen that no retaining pin is required for the opposite end of wedge member 24, due to its engagement with bolt 29.
- the device hereinbefore described and illustrated enables the blade to be initially secured sufficiently to allow it to seat against an anvil surface, and then be clamped to secure the blade for perforation of a web.
- the device exerts a uniform crash in or clamping force along the entire length of the blade.
- the device is relatively quick and simple to operate, is relatively easy to manufacture, and may be applied to cylinders having a standard configuration for the recess defined therein.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Claims (18)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US38430282A | 1982-06-01 | 1982-06-01 | |
| US384302 | 1982-06-01 | ||
| US06/383,865 US4475425A (en) | 1982-06-01 | 1982-06-01 | Blade holding device |
| US383865 | 1982-06-01 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0095912A2 EP0095912A2 (de) | 1983-12-07 |
| EP0095912A3 EP0095912A3 (en) | 1984-02-22 |
| EP0095912B1 true EP0095912B1 (de) | 1988-03-23 |
Family
ID=27010360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP83303078A Expired EP0095912B1 (de) | 1982-06-01 | 1983-05-27 | Klingenhalter |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0095912B1 (de) |
| CA (1) | CA1206374A (de) |
| DE (1) | DE3376058D1 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2619526B1 (fr) * | 1987-08-19 | 1992-08-28 | Moore Business Forms Inc | Dispositif pour le faconnage d'une bande de matiere telle que du papier |
| SE469940B (sv) * | 1992-01-14 | 1993-10-11 | Rolf Arne Larsson | Anordning för fasthållning av knivblad i en cylinder avsedd för bearbetning av en löpande bana |
| EP0879680A3 (de) * | 1997-04-22 | 1999-11-03 | Heinrich Prof. Dr. Ing. Feichtinger | Messerbefestigung für die Schneidmesser eines Schneidrotors |
| GB2332165B (en) * | 1997-12-13 | 2001-09-05 | T & S Engineering Company | Device and method for securing blades |
| CN109015854B (zh) * | 2018-08-14 | 2023-09-05 | 杭州中为光电技术有限公司 | 修边机刀头浮动机构 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1137216A (en) * | 1914-05-02 | 1915-04-27 | Carl J Klingborg | Cutter-head. |
| EP0073595A2 (de) * | 1981-08-22 | 1983-03-09 | Wadkin Public Limited Company | Drehmesserkopf |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2832411A (en) * | 1954-12-13 | 1958-04-29 | Bonnar Vawter Inc | Perforating blade holding means |
| US3709077A (en) * | 1971-03-01 | 1973-01-09 | Bretting C Mfg Co Inc | Cut-off device |
| US3793918A (en) * | 1971-10-12 | 1974-02-26 | H Huffman | Cross perforating blade lock |
| US4131047A (en) * | 1977-03-28 | 1978-12-26 | Harris Corporation | Rotary knife mounting |
-
1983
- 1983-05-27 EP EP83303078A patent/EP0095912B1/de not_active Expired
- 1983-05-27 DE DE8383303078T patent/DE3376058D1/de not_active Expired
- 1983-05-31 CA CA000429327A patent/CA1206374A/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1137216A (en) * | 1914-05-02 | 1915-04-27 | Carl J Klingborg | Cutter-head. |
| EP0073595A2 (de) * | 1981-08-22 | 1983-03-09 | Wadkin Public Limited Company | Drehmesserkopf |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0095912A3 (en) | 1984-02-22 |
| CA1206374A (en) | 1986-06-24 |
| DE3376058D1 (en) | 1988-04-28 |
| EP0095912A2 (de) | 1983-12-07 |
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