CA1101780A - Rotatable cutter mechanism for cutting different length notches in a moving web - Google Patents
Rotatable cutter mechanism for cutting different length notches in a moving webInfo
- Publication number
- CA1101780A CA1101780A CA156,089A CA156089A CA1101780A CA 1101780 A CA1101780 A CA 1101780A CA 156089 A CA156089 A CA 156089A CA 1101780 A CA1101780 A CA 1101780A
- Authority
- CA
- Canada
- Prior art keywords
- cutting
- cutter
- blade
- shaft
- rotatable
- 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
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
- B26D3/14—Forming notches in marginal portion of work by cutting
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S83/00—Cutting
- Y10S83/911—Envelope blank forming
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S83/00—Cutting
- Y10S83/917—Notching
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/485—Cutter with timed stroke relative to moving work
- Y10T83/494—Uniform periodic tool actuation
- Y10T83/501—With plural tools on a single tool support
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/929—Tool or tool with support
- Y10T83/9372—Rotatable type
- Y10T83/9391—Notching tool
Abstract
"ROTATABLE CUTTER MECHANISM FOR CUTTING DIFFERENT
LENGTH NOTCHES IN A MOVING WEB"
ABSTTRACT OF THE DISCLOSURE
The cutter mechanism includes a fixed cutter having side notches therein over which either a sheet, strip or an endless web of paper travels at a preselected speed. A
pair of rotatable cutters are mounted on shafts for rotation in timed relation to each other and to the speed of the sheet, strip or web. The rotatable cutters are positioned on opposite sides of the fixed cutter. Each of the rotatable cutters has a first radially extending cutter blade and a second radially extending cutter blade arranged longitudinally along the shaft and adjacent to each other. One of the radially extending blades is adjustable angularly relative to the other. The relative radial angle between the blades determines the length of the notch cut by the respective rotatable cutters in the side of the sheet, strip or web.
LENGTH NOTCHES IN A MOVING WEB"
ABSTTRACT OF THE DISCLOSURE
The cutter mechanism includes a fixed cutter having side notches therein over which either a sheet, strip or an endless web of paper travels at a preselected speed. A
pair of rotatable cutters are mounted on shafts for rotation in timed relation to each other and to the speed of the sheet, strip or web. The rotatable cutters are positioned on opposite sides of the fixed cutter. Each of the rotatable cutters has a first radially extending cutter blade and a second radially extending cutter blade arranged longitudinally along the shaft and adjacent to each other. One of the radially extending blades is adjustable angularly relative to the other. The relative radial angle between the blades determines the length of the notch cut by the respective rotatable cutters in the side of the sheet, strip or web.
Description
This invention relates to a rotatable cutter mechanism for cutting different length notches in a moving sheet, strip or web and more particularly to a rotatable cutter mechanism with angularly adjustable radially extending blades.
Rotating blade type cutters for cutting notches in a moving web are known. German OLS 1,7~9,658 in the name of Bruno Pahlitzsch, entitled "Cutting Arrangement For Envelope And Bag Machines", discloses apparatus for cutting notches in the side of an endless web to form the side edges for the bottom flaps and seal flaps of adjacent envelope blanks formed from the endless web. The radially extending cutter blades are unitary in construction and are arranged to cut notches of a fixed length. To change the length of the bottom flap portion of the envelope blank it is necessary with the known apparatus to remove both the fixed cutter blade and the radially extending cutter blades by substituting blades of different length. This requires dismantling the apparatus and maintaining an inventory of blades having different lengths.
U. S. Patent 1,586,055~discloses apparatus for cutting envelope blank`s from moving sheets and one embodiment illustrates first severing sheets of a given length and width and thereafter conveying the sheet to a cutting station where a pair of sheets have their adjacent edges cut out by a composite blanking die to form the side edges of the respective envelope blanks. The width of the blanks may be varied by cutting sheets of di~ferent widths from the wek. The shape and dimension of the cut out side edges of the blank cannot be changed without changing the composite blanking die. There is a need for a rotatable cutter mechanism that may be easily and quickly adjusted to cut notches in the sides of the web, strip or sheet of different lengths so that envelope blanks having different length bottom flaps may be formed without changing the cutting blades.
In accordance with the present invention, the rotatable cutter mechanism for cutting notches of different lengths in a moving segment such as a sheet, strip or web includes a fixed cutter having at least one blade portion extending longitudinally along the side thereof. The fixed cutter is arranged to support the moving segment with a side portion of the segment extending over the fixéd cutter blade portion. A shaft is rotatably mounted on the side of the fixed cutter in spaced relation to the fixed cutter blade portion. A rotatable cutter is mounted on the shaft for rotation therewith and the rotatable cutter has a pair of rotatable cutter blades extending radially therefrom~ One of the rotatable cutter blades is angularly adjustable relative to the other rotatable cutter blade so that the relative radial angle between the blades controls the length of the notch cut in the side portion of the segment supported by the fixed cutter blade.
The fixed cutter blade has a notch of a predetermined cQnfiguration and the radial cutter blades have a similar con-figuration and pass through the fixed cutter blade notch portion.
The radial cutter blades are arranged longitudinally along the shaft and æe adjacent to each other. One of the rotatable cutter blades has a radial edge configuration that forms the side edge of an envelope blank seal flap and a portion of the side edge of the adjacent envelope blank bottom flap. The other blade has a radial edge confi~uration that forms the remainder of the adjacent envelope blank bottom flap portion.
Rotating blade type cutters for cutting notches in a moving web are known. German OLS 1,7~9,658 in the name of Bruno Pahlitzsch, entitled "Cutting Arrangement For Envelope And Bag Machines", discloses apparatus for cutting notches in the side of an endless web to form the side edges for the bottom flaps and seal flaps of adjacent envelope blanks formed from the endless web. The radially extending cutter blades are unitary in construction and are arranged to cut notches of a fixed length. To change the length of the bottom flap portion of the envelope blank it is necessary with the known apparatus to remove both the fixed cutter blade and the radially extending cutter blades by substituting blades of different length. This requires dismantling the apparatus and maintaining an inventory of blades having different lengths.
U. S. Patent 1,586,055~discloses apparatus for cutting envelope blank`s from moving sheets and one embodiment illustrates first severing sheets of a given length and width and thereafter conveying the sheet to a cutting station where a pair of sheets have their adjacent edges cut out by a composite blanking die to form the side edges of the respective envelope blanks. The width of the blanks may be varied by cutting sheets of di~ferent widths from the wek. The shape and dimension of the cut out side edges of the blank cannot be changed without changing the composite blanking die. There is a need for a rotatable cutter mechanism that may be easily and quickly adjusted to cut notches in the sides of the web, strip or sheet of different lengths so that envelope blanks having different length bottom flaps may be formed without changing the cutting blades.
In accordance with the present invention, the rotatable cutter mechanism for cutting notches of different lengths in a moving segment such as a sheet, strip or web includes a fixed cutter having at least one blade portion extending longitudinally along the side thereof. The fixed cutter is arranged to support the moving segment with a side portion of the segment extending over the fixéd cutter blade portion. A shaft is rotatably mounted on the side of the fixed cutter in spaced relation to the fixed cutter blade portion. A rotatable cutter is mounted on the shaft for rotation therewith and the rotatable cutter has a pair of rotatable cutter blades extending radially therefrom~ One of the rotatable cutter blades is angularly adjustable relative to the other rotatable cutter blade so that the relative radial angle between the blades controls the length of the notch cut in the side portion of the segment supported by the fixed cutter blade.
The fixed cutter blade has a notch of a predetermined cQnfiguration and the radial cutter blades have a similar con-figuration and pass through the fixed cutter blade notch portion.
The radial cutter blades are arranged longitudinally along the shaft and æe adjacent to each other. One of the rotatable cutter blades has a radial edge configuration that forms the side edge of an envelope blank seal flap and a portion of the side edge of the adjacent envelope blank bottom flap. The other blade has a radial edge confi~uration that forms the remainder of the adjacent envelope blank bottom flap portion.
- 2 -: -: . - . -By rotating one of the rotatable cutter blades relative to the other on the rotatable shaft the timing sequence of the cut-ting operation by the rotatable blades is controlled to permit a greater or lesser portion of the moving segment to pass beneath the second blade to increase or decrease the length of the bottom flap. Both cutter blades have overlapped portions that compensate for the angular position of the blades to each other and provide a continuous linear cut for the bottom flap side edge.
Accordingly, the principal object of this invention is to provide a rotatable cutter mechanism that is arranged to cut notches of different lengths in a moving segment without changing the rotatable cutting blade.
Another object of this invention is to provide a rotatable cutter mechanism for cutting the side edges of adjacent envelope blank seal flap and bottom flap portions without changing of the rotatable cutter blade angle on the rotatable shaft.
A further object of this invention is to provide a rotatable cutter mechanism to cut notches of different length in a moving segment without changing the cutter blades that support the moving segment.
These and other objects of this invention will be more completely disclosed and described in the following specification, the accompany drawings and the appended claims.
Figure 1 is a top plan view of a rotating cutter mechanism arranged to cut the side edges for the bottom flap and seal flap of adjacent envelope blanks thereafter cut from the continuous web.
Accordingly, the principal object of this invention is to provide a rotatable cutter mechanism that is arranged to cut notches of different lengths in a moving segment without changing the rotatable cutting blade.
Another object of this invention is to provide a rotatable cutter mechanism for cutting the side edges of adjacent envelope blank seal flap and bottom flap portions without changing of the rotatable cutter blade angle on the rotatable shaft.
A further object of this invention is to provide a rotatable cutter mechanism to cut notches of different length in a moving segment without changing the cutter blades that support the moving segment.
These and other objects of this invention will be more completely disclosed and described in the following specification, the accompany drawings and the appended claims.
Figure 1 is a top plan view of a rotating cutter mechanism arranged to cut the side edges for the bottom flap and seal flap of adjacent envelope blanks thereafter cut from the continuous web.
3 --~1.7~30 Figure 2 is a view in section taken along the Line II-II of Figure 1, illustrating the angular displacement of the cutter blades mounted on the rotatable shaft.
Figure 3 is a perspective view, illustrating the radially extending blades cutting the seal flap and bottom flap notch in an endless web.
Figures 4 and 5 are schematic views in elevation similar to ~igure 2, illustrating different angular displace-ments between the rotatable cutter blades mounted on the rotatable shaft.
Figures 4a and 5b are a schematic exaggerated illustration of a continuous web having different lengths of bottom flap side edges cut therein. Figures 4a and 5b are intended to designate the difference in length of the bottom flap side edge by changing the angular relation between the rotatable cutter blades as illustrated in Figures 4 and 5.
Throughout the specification the rotatable cutter mechanism is described as cutting notches in the side edge portions of a continuous web that is therea~ter cut transversely to form separate envelope blanks. It should be understood the - rotatable cutter mechanism is also operable to cut notches in the side edges of strips or sheets and the use of the term "segment" is intended to include either an endless web, an elongated strip or a sheet with a predetermined length. ~onven-tional means such as pinch rolls, driven pressure rolls and the like may be employed to convey the elongated strip or sheet along the platform at a preselected speed so that the notches of different lengths can be cut in one or both of the side edges.
The description also includes a pair of rotatable cutter mechanisms to simultaneously cut not~hes in both edges of the _ ~1¢~1780 segment. It should be further understood the invention may be practiced with a single rotatable cutter mechanism to cut a notch in one side edge of the segment.
Referring to the drawings and particularly Figure 1 there is disclosed a rotatable cutter mechanism generally designated by the numeral 10 that has a suitable table portion 12 with an upstanding channel shaped support means 14 for the fixed cutter generally designated by the numeral 16.
The fixed cutter 16 has a pair of fixed cutter blades 18 and 20 suitably secured to the support means 14 of table 12 by means of screws or bolts 22. The cutter blades 18 and 20 may be removed from the table support 14 for sharpening or to substitute blades of a different configuration.
The cutter blades 18 and 20 have substantially the same edge configuration with a first inwardly offset straight edge portion 24 that is connected to a second outwardly offset straight edge portion 26 by an arcuate or curved edge portion 28. The straight portion 24 terminates in an inwardly extending notch 30. Another inwardly offset straight edge portion 32 is aligned with straight edge portion 24 and is connected to the slotted portion 30 at one end and an arcuate curved edge portion 34 at the other end. The curved portion 34 connects the straight portion 32 with another outwardly offset straight -edge portion 36 that is aligned with straight edge portion 26.
An segment of paper illustrated as an endless web 3B
is arranged to be conveyed over the table 12 and fixed support 14 in the direction of the arrow at a preselected speed and has a width slightly smaller than the distance between the straight edge outer portions 26 of the spaced knife blades 18 and 20. The configuration of blades 18 and 20 are arranged to support the web so that rotatable blades having a similar configuration as the edges of the blades 18 and 20 cut notches 40 and 42 in the side edges 44 and 46 of web 38. The notches 40 and 42 form the seal flap portion 48 and the bottom flap portion 50 of adjacent envelope blanks formed in the web 38.
After the notches 40 and 42 are formed in the web, the web is cut along the dotted line 52 to form envelope blanks.
The notches 40 and 42 are formed in the web 38 by the co-action of pairs of rotatable cutters generally designated by the numerals 54 and 56 with the fixed cutter 16.
The rotatable cutters 54 and 56 are similar in construction and similar numerals will be used to indicate similar parts.
The rotatable cutters 54 and 56 are non-rotatably mounted on a pair of rotatable shafts 58 and 60 that are in turn rotatably mounted in pillow blocks 62, 64, 66 and 68 on the table 12. The rotatable shafts 58 and 60 have end portions 70 and 72 connected through suitable couplings 74 and 76 to gear boxes 78 and 80.
Within the gear box 78 there is suitable gearing connecting an input shaft 81 to a pair of output shafts 82 and 84. The output shaft 82 is connected through coupling 74 to rotatable shaft 58. The output shaft 84 is connected to the input shaft 86 of gear box 80 and gear box 80 contains suitable gears connecting the output shaft 88 throllgh coupling 76 to rotatable shaft 60. With this arrangement there is provided a common drive for both of the rotatable shafts 58 and 60 and the shafts 58 and 60 are mechanically connected to each other through the above described connections. With this arrange-ment the shafts 58 and 60 rotate in fixed timed relation to each other and are maintained in fixed timed relation by the mechanical connections.
~J 7~
The rotatable cutters 54 and 56 are illustrated in detail in Figures 2 and 3 and include a lead or seal flap blade holder 90 and a trailing or bottom flap blade holder 92.
The lead or seal flap blade holder 9o has separate semi-cylindrical top portions 94 and bottom portion 100 that are clampingly engaged to the respective shafts 58 and 60. The top portion 94 has a radially extending blade connecting portion 96 and an opposite radially extending bolt flange 98. The semi-cylindrical bottom portion 100 also has a radially extending blade connecting portion 102 and an oppositely radially extending bolt flange 104. Suitable bolt apertures 130 are provided in the blade holder top and bottom portions 94 and 100 for bolts 132 to secure the blade holders 90 to the respective shafts 58 and 60 and secure a radially extending leading blade 106 between the blade portions 96 and 102. The respective shafts 58 and 60 have a recessed key portion 108 and the blade holder bottom portion 100 has a mating recess 110 in which a key is positioned to nonrotatably secure the leading or seal flap blade portion 90 to the respective shafts 58 and 60.
The trailing or bottom flap blade holder 92 is sLmilarly engaged to the shaft with the exception of being keyed to the shaft. The blade holder 92 has an upper semi-cylindrical portion 112 with a radially extending blade connecting portion 114 and a radially oppositely extending bolt flange 116. The lower semi-cylindrical portion 118 has a radially extending blade connecting portion 120 and oppositely extending bolt flange 122. A trailing or bottom flap blade 124 is secured between the blade connecting portions 114 and 120. The traiIing or bottom flap blade holder 92 is positioned on and fr~ictionally secured to the respective shafts 58 and 60 by 7~
bolts, and annular spacers 126 and 128 are provided to maintain the trailing or bottom flap blade holder 92 in proper axial spaced relation with the leading or seal flap blade holder 90.
The trailing or bottom flap blade holder 92 is rotatably adjustable and may be rotated about the respective shafts 58 and 60 to a preselected angle relative to the leading or seal flap blade holder 90 so that the blades 106 and 124 are radially spaced from each other at a preselected angle and the blade 124 will follow blade 106 and cut its portion of the notch 40 or 42 after the blade 106. The blade holder 92 is secured in this angular position by tightening of the bolts thereon.
Although a specific configuration of the blade holder has been described, it should be understood that other suitable blade holders may be employed to secure the blades to the shaft and permit adjustment of one of the blades relative to the other blade. Although the cutter mechanism knife blade holders are described as separate holders, it should be understood that they could be fabricated as an integral unit providing radial angular adjustment for the cutter blades.
The lead or seal flap blade 106 has an arcuate curved edge portion 136 that is connected to a straight outwardly extending edge portion 138. The straight edge portion terminates in an outwardly extending protuberance 140 that has the same configuration as the notch 30 in the fixed blades 18 and 20. The lead blade 106 has a rearwardly extending flange 14Z with a straight edge portion 144 that is aligned with the straight edge portion 138. The con- : ~
figuration of the arcuate edge portion 136, straight edge --- 8 _ , 7~i~
portion 138 and protuberance 140 is the same as the con-figuration of edges 24 and 28 and notch 30 of fixed blades 18 and 20. The straight edge portion 144 of lead blade 106 has substantially the same configuration as the straight edge portion 32 of fixed blades 18 and 20, but does not have the same length as the edge 32 of fixed blades 18 and 20.
The trailing blade 124 has an arcuate edge portion 148 and a straight edge portion 150. The arcuate edge portion 148 has the same configuration as the arcuate portion 34 of fixed blades 18 and 20 and the straight edge portion 150 has the same configuration as the straight edge portion 32 of fixed blades 18 and 20. The trailing blade 124 has a portion -~
or flange 148a that e~tends forwardly and overlaps the rearwardly extending flange 142 on lead blade 106.
The trailing blade 124 may be angularly adjusted relative to the lead blade 106 as illustrated in Figures 4 and 5, where in Figure 5 the angle between the blades 106 and 124 is greater than the angle between the respective blades as ~; illustrated in Figure 4. The length of the bottom flap portion 50 of the envelope blank is determined by the angle between the respective blades 106 and 124. For example/ in Figure 4a the bottom flap 50 formed in the web is substantially shorter than the bottom flap 50 illustrated in Figure 5b. The length of the notches 40 and 42 is also longer in Figure 5b when compared with Figure 4a.
The rotary cutters 54 and 56 with the respective separate blades 106 and 124 cut the notches in the web 38 in the following manner. The web is conveyed longitudinally along the table 1~ at a preselected speed and the shafts 58 and 60 are rotated in opposite directions at a second _ g _ preselected speed. The speed of the web and the shafts 58 and 60 control the length of the envelope blanks. For example, where an envelope blank having a bottom flap dime.~ on A, as illustrated in Figure 4a, is desired, the ~railing blade 124 is arranged at an angle to the lead blade 106 as illustrated in Figure 4. Upon rotation of the shafts 58 and 60 the lead blade 106 first cuts a portion of a notch 40 or 42 in the side edge of the web. Subsequent to cutting a front portion of the notch in the web, the web, because of its continued forward movement, advances so that the lead edge of the notch illustrated in dotted lines in Figure 1 designated by the letter L has advanced to the location illustrated by the dotted line and the trailing edge of the portion of the notch cut by the blade 106 has also advanced and is designated by the letter T. Continued rotation of the shafts 58 and 60 brings the trailing blade 124 in contact with the web side edge, as is illustrated in Figure 1, to cut the remainder of the notch 40 or 42. The flange portion 148a on blade 12~
overlies the trailing edge T cut by blade 106 to remove the uncut portion of the web between the rear radial edge 152 of the blade 106 and the trailing edge of the portion of the notch cut by the blade 106 To increase the length of the envelope blank bottom flap 50 the angle between the blades 106 and 124 is increased, ~s is illustrated in Figure 5, so that the trailing blade on rotation of the shaft 60 forms a remainder of the notch at a later time than with the angular arrangement illustrated in Figure 4, thus giving the web more time to advance the trailing edge of the notch T before the blade 124 rotates into cutting relation with the web side edge. It will be - . . : . , . - : -' ' ' ~
7~
apparent that it is now possible without changing the fixed blades 18 and 20 or removing the rotary cutters 54 and 56 to cut notches of varying length in the side edges of a web.
The greater the delay in the respective blades 106 and 124 rotating into cutting relation with the side edge of the web, the longer the bottom flap portion of the envelope blank.
The delay is increased or decreased by the relative angle between the respective blades on the rotating shaft. It will also be apparent that it is now possible without changing the fixed blades 18 and 20 or removing the rotary cutters 54 and 56 to cut notches of varying length in the side edges of a moving elongated strip or sheet. Also, the rotary cutters 54 and 56 may have different blade configurations to cut notches having a configuration that differs from the notch configura-tion illustrated.
~ccording to the provisions of the patent statutes, I have explained the principle, preferred construction and mode of operation of my invention and have illustrated and described what I now consider to represent its best embodi-ments.
Figure 3 is a perspective view, illustrating the radially extending blades cutting the seal flap and bottom flap notch in an endless web.
Figures 4 and 5 are schematic views in elevation similar to ~igure 2, illustrating different angular displace-ments between the rotatable cutter blades mounted on the rotatable shaft.
Figures 4a and 5b are a schematic exaggerated illustration of a continuous web having different lengths of bottom flap side edges cut therein. Figures 4a and 5b are intended to designate the difference in length of the bottom flap side edge by changing the angular relation between the rotatable cutter blades as illustrated in Figures 4 and 5.
Throughout the specification the rotatable cutter mechanism is described as cutting notches in the side edge portions of a continuous web that is therea~ter cut transversely to form separate envelope blanks. It should be understood the - rotatable cutter mechanism is also operable to cut notches in the side edges of strips or sheets and the use of the term "segment" is intended to include either an endless web, an elongated strip or a sheet with a predetermined length. ~onven-tional means such as pinch rolls, driven pressure rolls and the like may be employed to convey the elongated strip or sheet along the platform at a preselected speed so that the notches of different lengths can be cut in one or both of the side edges.
The description also includes a pair of rotatable cutter mechanisms to simultaneously cut not~hes in both edges of the _ ~1¢~1780 segment. It should be further understood the invention may be practiced with a single rotatable cutter mechanism to cut a notch in one side edge of the segment.
Referring to the drawings and particularly Figure 1 there is disclosed a rotatable cutter mechanism generally designated by the numeral 10 that has a suitable table portion 12 with an upstanding channel shaped support means 14 for the fixed cutter generally designated by the numeral 16.
The fixed cutter 16 has a pair of fixed cutter blades 18 and 20 suitably secured to the support means 14 of table 12 by means of screws or bolts 22. The cutter blades 18 and 20 may be removed from the table support 14 for sharpening or to substitute blades of a different configuration.
The cutter blades 18 and 20 have substantially the same edge configuration with a first inwardly offset straight edge portion 24 that is connected to a second outwardly offset straight edge portion 26 by an arcuate or curved edge portion 28. The straight portion 24 terminates in an inwardly extending notch 30. Another inwardly offset straight edge portion 32 is aligned with straight edge portion 24 and is connected to the slotted portion 30 at one end and an arcuate curved edge portion 34 at the other end. The curved portion 34 connects the straight portion 32 with another outwardly offset straight -edge portion 36 that is aligned with straight edge portion 26.
An segment of paper illustrated as an endless web 3B
is arranged to be conveyed over the table 12 and fixed support 14 in the direction of the arrow at a preselected speed and has a width slightly smaller than the distance between the straight edge outer portions 26 of the spaced knife blades 18 and 20. The configuration of blades 18 and 20 are arranged to support the web so that rotatable blades having a similar configuration as the edges of the blades 18 and 20 cut notches 40 and 42 in the side edges 44 and 46 of web 38. The notches 40 and 42 form the seal flap portion 48 and the bottom flap portion 50 of adjacent envelope blanks formed in the web 38.
After the notches 40 and 42 are formed in the web, the web is cut along the dotted line 52 to form envelope blanks.
The notches 40 and 42 are formed in the web 38 by the co-action of pairs of rotatable cutters generally designated by the numerals 54 and 56 with the fixed cutter 16.
The rotatable cutters 54 and 56 are similar in construction and similar numerals will be used to indicate similar parts.
The rotatable cutters 54 and 56 are non-rotatably mounted on a pair of rotatable shafts 58 and 60 that are in turn rotatably mounted in pillow blocks 62, 64, 66 and 68 on the table 12. The rotatable shafts 58 and 60 have end portions 70 and 72 connected through suitable couplings 74 and 76 to gear boxes 78 and 80.
Within the gear box 78 there is suitable gearing connecting an input shaft 81 to a pair of output shafts 82 and 84. The output shaft 82 is connected through coupling 74 to rotatable shaft 58. The output shaft 84 is connected to the input shaft 86 of gear box 80 and gear box 80 contains suitable gears connecting the output shaft 88 throllgh coupling 76 to rotatable shaft 60. With this arrangement there is provided a common drive for both of the rotatable shafts 58 and 60 and the shafts 58 and 60 are mechanically connected to each other through the above described connections. With this arrange-ment the shafts 58 and 60 rotate in fixed timed relation to each other and are maintained in fixed timed relation by the mechanical connections.
~J 7~
The rotatable cutters 54 and 56 are illustrated in detail in Figures 2 and 3 and include a lead or seal flap blade holder 90 and a trailing or bottom flap blade holder 92.
The lead or seal flap blade holder 9o has separate semi-cylindrical top portions 94 and bottom portion 100 that are clampingly engaged to the respective shafts 58 and 60. The top portion 94 has a radially extending blade connecting portion 96 and an opposite radially extending bolt flange 98. The semi-cylindrical bottom portion 100 also has a radially extending blade connecting portion 102 and an oppositely radially extending bolt flange 104. Suitable bolt apertures 130 are provided in the blade holder top and bottom portions 94 and 100 for bolts 132 to secure the blade holders 90 to the respective shafts 58 and 60 and secure a radially extending leading blade 106 between the blade portions 96 and 102. The respective shafts 58 and 60 have a recessed key portion 108 and the blade holder bottom portion 100 has a mating recess 110 in which a key is positioned to nonrotatably secure the leading or seal flap blade portion 90 to the respective shafts 58 and 60.
The trailing or bottom flap blade holder 92 is sLmilarly engaged to the shaft with the exception of being keyed to the shaft. The blade holder 92 has an upper semi-cylindrical portion 112 with a radially extending blade connecting portion 114 and a radially oppositely extending bolt flange 116. The lower semi-cylindrical portion 118 has a radially extending blade connecting portion 120 and oppositely extending bolt flange 122. A trailing or bottom flap blade 124 is secured between the blade connecting portions 114 and 120. The traiIing or bottom flap blade holder 92 is positioned on and fr~ictionally secured to the respective shafts 58 and 60 by 7~
bolts, and annular spacers 126 and 128 are provided to maintain the trailing or bottom flap blade holder 92 in proper axial spaced relation with the leading or seal flap blade holder 90.
The trailing or bottom flap blade holder 92 is rotatably adjustable and may be rotated about the respective shafts 58 and 60 to a preselected angle relative to the leading or seal flap blade holder 90 so that the blades 106 and 124 are radially spaced from each other at a preselected angle and the blade 124 will follow blade 106 and cut its portion of the notch 40 or 42 after the blade 106. The blade holder 92 is secured in this angular position by tightening of the bolts thereon.
Although a specific configuration of the blade holder has been described, it should be understood that other suitable blade holders may be employed to secure the blades to the shaft and permit adjustment of one of the blades relative to the other blade. Although the cutter mechanism knife blade holders are described as separate holders, it should be understood that they could be fabricated as an integral unit providing radial angular adjustment for the cutter blades.
The lead or seal flap blade 106 has an arcuate curved edge portion 136 that is connected to a straight outwardly extending edge portion 138. The straight edge portion terminates in an outwardly extending protuberance 140 that has the same configuration as the notch 30 in the fixed blades 18 and 20. The lead blade 106 has a rearwardly extending flange 14Z with a straight edge portion 144 that is aligned with the straight edge portion 138. The con- : ~
figuration of the arcuate edge portion 136, straight edge --- 8 _ , 7~i~
portion 138 and protuberance 140 is the same as the con-figuration of edges 24 and 28 and notch 30 of fixed blades 18 and 20. The straight edge portion 144 of lead blade 106 has substantially the same configuration as the straight edge portion 32 of fixed blades 18 and 20, but does not have the same length as the edge 32 of fixed blades 18 and 20.
The trailing blade 124 has an arcuate edge portion 148 and a straight edge portion 150. The arcuate edge portion 148 has the same configuration as the arcuate portion 34 of fixed blades 18 and 20 and the straight edge portion 150 has the same configuration as the straight edge portion 32 of fixed blades 18 and 20. The trailing blade 124 has a portion -~
or flange 148a that e~tends forwardly and overlaps the rearwardly extending flange 142 on lead blade 106.
The trailing blade 124 may be angularly adjusted relative to the lead blade 106 as illustrated in Figures 4 and 5, where in Figure 5 the angle between the blades 106 and 124 is greater than the angle between the respective blades as ~; illustrated in Figure 4. The length of the bottom flap portion 50 of the envelope blank is determined by the angle between the respective blades 106 and 124. For example/ in Figure 4a the bottom flap 50 formed in the web is substantially shorter than the bottom flap 50 illustrated in Figure 5b. The length of the notches 40 and 42 is also longer in Figure 5b when compared with Figure 4a.
The rotary cutters 54 and 56 with the respective separate blades 106 and 124 cut the notches in the web 38 in the following manner. The web is conveyed longitudinally along the table 1~ at a preselected speed and the shafts 58 and 60 are rotated in opposite directions at a second _ g _ preselected speed. The speed of the web and the shafts 58 and 60 control the length of the envelope blanks. For example, where an envelope blank having a bottom flap dime.~ on A, as illustrated in Figure 4a, is desired, the ~railing blade 124 is arranged at an angle to the lead blade 106 as illustrated in Figure 4. Upon rotation of the shafts 58 and 60 the lead blade 106 first cuts a portion of a notch 40 or 42 in the side edge of the web. Subsequent to cutting a front portion of the notch in the web, the web, because of its continued forward movement, advances so that the lead edge of the notch illustrated in dotted lines in Figure 1 designated by the letter L has advanced to the location illustrated by the dotted line and the trailing edge of the portion of the notch cut by the blade 106 has also advanced and is designated by the letter T. Continued rotation of the shafts 58 and 60 brings the trailing blade 124 in contact with the web side edge, as is illustrated in Figure 1, to cut the remainder of the notch 40 or 42. The flange portion 148a on blade 12~
overlies the trailing edge T cut by blade 106 to remove the uncut portion of the web between the rear radial edge 152 of the blade 106 and the trailing edge of the portion of the notch cut by the blade 106 To increase the length of the envelope blank bottom flap 50 the angle between the blades 106 and 124 is increased, ~s is illustrated in Figure 5, so that the trailing blade on rotation of the shaft 60 forms a remainder of the notch at a later time than with the angular arrangement illustrated in Figure 4, thus giving the web more time to advance the trailing edge of the notch T before the blade 124 rotates into cutting relation with the web side edge. It will be - . . : . , . - : -' ' ' ~
7~
apparent that it is now possible without changing the fixed blades 18 and 20 or removing the rotary cutters 54 and 56 to cut notches of varying length in the side edges of a web.
The greater the delay in the respective blades 106 and 124 rotating into cutting relation with the side edge of the web, the longer the bottom flap portion of the envelope blank.
The delay is increased or decreased by the relative angle between the respective blades on the rotating shaft. It will also be apparent that it is now possible without changing the fixed blades 18 and 20 or removing the rotary cutters 54 and 56 to cut notches of varying length in the side edges of a moving elongated strip or sheet. Also, the rotary cutters 54 and 56 may have different blade configurations to cut notches having a configuration that differs from the notch configura-tion illustrated.
~ccording to the provisions of the patent statutes, I have explained the principle, preferred construction and mode of operation of my invention and have illustrated and described what I now consider to represent its best embodi-ments.
Claims
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. A rotatable cutter mechanism for cutting differ-ent length notches in a moving segment comprising, a uni-tary fixed cutter blade mounted on a support member, said unitary fixed cutter blade having a continuous cutting surface, a shaft rotatably supported adjacent to said fixed cutter blade, drive means to rotate said shaft, rotatable cutter means secured to said shaft for rotation therewith, said rotatable cutter means having a pair of separate radially extending cutter blade means positioned in side-by-side relation and non-rotatably secured to said shaft, at least one of said cutter blade means being adjustably mounted on said shaft for preselected rotation relative to the other of said cutter blade means to thereby adjust the angular displacement between said separate cutter blade means, said rotatable cutter means positioned adjacent to said unitary fixed cutter blade so that upon rotation of said rotatable cutter means said radially extending cutter blade means move in a circular path and periodically move into cutting relation with said unitary fixed cutter blade, and said radially extending separate cutter blade means being angularly displaced from each other so that upon rotation of said rotatable cutter means one of said separ-ate cutter blade means moves into cutting relation with said unitary fixed cutter blade and thereafter the other rotatable cutter blade means moves into cutting relation with said unitary fixed cutter blade, and means to continuously move said segment through the cutter mechanism.
A rotatable cutter mechanism for cutting different length notches in a moving segment as set forth in claim 1 in which, said radially extending blade means first leading portion includes a rearwardly extending portion and said second trailing portion includes a forwardly extending por-tion, said forwardly extending portion positioned in over-lapped relation with said rearwardly extending portion.
A rotatable cutter mechanism for cutting different length notches in a moving segment as set forth in claim 2 in which, said rearwardly extending portion and said forwardly extending portions having substantially straight blade edge portions.
A rotatable cutter mechanism for cutting different length notches in a moving segment as set forth in claim 1 in which, said first leading portion having a blade edge portion arranged to cut an envelope blank seal flap side edge and a portion of an adjacent envelope blank bottom flap side edge in the side edge of a moving segment, and said second trailing edge portion having a plade edge portion to cut the remaining portion of said adjacent envelope blank bottom flap edge.
A rotatable cutter mechanism for cutting different length notches in a moving segment as set forth in claim 1 in which, said radially extending separate cutter blade means each includes a cutter blade, said cutter blades positioned in side-by-side relation.
A rotatable cutter mechanism for cutting different length notches in a moving segment as set forth in claim 5 which includes, separate cutter blade holders nonrotatably mounted on a rotatable shaft, said separate cutter blade holders mounted on said shaft adjacent to each other, at least one of said blade holders being adjustably mounted on said shaft for preselected rotation relative to the other of said blade holders to thereby adjust the angular displace-ment between said separate cutter blades.
A rotatable cutter mechanism for cutting different length notches in a moving segment as set forth in claim 1 which includes, a fixed cutter means mounted in a platform, blade side edge portions along opposite sides of said fixed cutter means, a pair of rotatable shafts mounted in parallel spaced relation on opposite sides of said fixed cutter means, said rotatable cutter means mounted on each of said shafts, said rotatable cutter means each having radially extending blade means operable upon rotation of said shafts to move in a circular path and once during each revolution of said shafts to move into cutting relation with the adjacent blade side edge portions of said fixed cutter means, and each of said radially extending blade means having a first leading portion angularly displaced from a second trailing portion being substantially the same for both radially extending blade means so that notches of substantially the same length are cut in a segment moving parallel to and between said rotat-able shafts.
A rotatable cutter mechanism for cutting different length notches in a moving segment as set forth in claim 7 in which, said first leading portions of both of said radially extending blade means arranged to cut envelope blank seal flap side edges and a portion of an adjacent envelope blank bottom flap side edge in opposite sides of said segment moving between said rotatable shafts, said second trailing portions of both of said radially extending blade means arranged to cut the remaining portions of said adjacent envelope blank bottom plap side edges in said segment.
A rotatable cutter mechanism as set forth in claim 1 in which said segment comprises a web.
A rotatable cutter mechanism as set forth in claim 1 in which said segment comprises a sheet having a predeter-mined length and width.
A method for cutting envelope blanks having bottom flap edges comprising, moving a segment along a platform at a preselected speed above a pair of fixed cutter blades, one of said fixed cutter blades positioned on one side of said moving segment and the other of said fixed cutter blades positioned on the other side of said moving segment, rotating a pair of shafts at a preselected speed, one of said shafts positioned on one side of said moving segment and the other of said shafts positioned on the other side of said moving segment, each of said shafts having a pair of blades extending radially therefrom, moving said pairs of radially extending blades mounted on each of said shafts on opposite sides of said segment in a circular path into abutting realation with said pair of fixed cutter blades to periodically cut envelope blank seal flap side edges and adjacent bottom flap side edges in the opposite sides of said moving segment, and varying the angular displacement between each said pair of radially extending blades while said blades are stationary to vary the effective cutting length of said pairs of blades to thereby vary the length of said bottom flap side edges cut in the opposite sides of said moving segment.
A method for cutting envelope blanks having bottom flap edges as set forth in claim 11 which lncludes, changing the angular displacement between a first leading portion and a second trailing portion of said radially extending blades to thereby change the time interval between the cutting operation of said first leading portion and second trailing portion to thereby change the length of said bottom flap side edges cut in the opposite sides of said moving segment.
A method for cutting envelope blanks having bottom flap edges as set forth in claim 11 in which, said moving segment comprises an endles web.
A method for cutting envelope blanks having bottom flap edges as set forth in claim 11 in which, said moving segment comprises a sheet having a predetermined length and width.
A method for cutting envelope blanks having bottom flap edges as set forth in claim 11 which includes, changing the angular displacement between a first portion and a second portion of said radially extending blades to thereby change the time interval between the cutting oper-ation of said first portion and said second portion to thereby change the length of said side edges cut in the opposite sides of said moving segment.
16. A rotary cutting apparatus for removing sections from a longitudinally advancing web of sheet material com-prising: a stationary cutting knife over which at least one side of the advancing web of sheet material passes in a cutting operation, the stationary knife having a cutting edge determining the contours of a section to be removed from the one side of the web; a first rotary knife having a cutting edge corresponding to at least part of the cutting edge of the stationary knife and supported for rotation about a rotational axis substantially parallel to the side of the advancing web and bringing the cutting edge of the first rotary knife and the stationary knife into cooperative cutting relatonship with the web of sheet material at the one side; a second rotary knife having a cutting edge corresponding to at least part of the cutting edge of the same stationary knife cooperating with the first knife and supported for rotation about the rotational axis of the first knife and in spaced relationship about the rotation-al axis to the first rotary knife to also bring the cutting edges of the second knife and the stationary knife into cooperative cutting relationship with the web of sheet material at the one side; and means for adjusting the spaced relationship of the first and second rotary knives about the rotational axis.
A rotary cutting apparatus as defined in claim 16 wherein the part of the cutting edge of the stationary knife corresponding in shape with the first rotary knife and the part of the cutting edge of the stationary knife corresponding in shape with the second rotary knife overlap.
A rotary cutting apparatus as defined in claim 17 wherein the spaced relationship of the first and second rotary knives about the rotational axis is an angular spacing no larger than the angular spacing causing the cuts of the first and second knives in the advancing web to be contiguous.
A rotary cutting apparatus as defined in claim 16 wherein the spaced relationship of the first and second rotary knives about the rotational axis is an angle defined by a ratio in which the numerator is the longitudinal length of the web cut by the second rotary knife and the denominator is the longitudinal length of the web between corresponding points of serially adjacent blanks cut by the apparatus.
A rotary cutting apparatus as defined in claim 16 further including an orbor shaft supported relative to the stationary knife for rotation about the rotational axis of the first and second rotary knives; and wherein the first and second rotary knives are mounted on and project radially from the arbor shaft.
A rotary cutting apparatus as defined in claim 20 further including a first clamp secured to the arbor shaft and mounting the first rotary knife to the shaft for rotation with the shaft; and a second clamp adjustably secured to the arbor shaft for angular adjustment about the shaft and mounting the second rotary knife to the shaft for rotation with the shaft and angular adjustment about the shaft relative to the first rotary knife.
A rotary cutting apparatus as defined in claim 21 wherein the first and second clamps are secured to the arbor shaft at axially adjacent stations; and a key is interposed between the first clamp and the shaft to hold the first clamp at a given angular position relative to the shaft.
.
1. A rotatable cutter mechanism for cutting differ-ent length notches in a moving segment comprising, a uni-tary fixed cutter blade mounted on a support member, said unitary fixed cutter blade having a continuous cutting surface, a shaft rotatably supported adjacent to said fixed cutter blade, drive means to rotate said shaft, rotatable cutter means secured to said shaft for rotation therewith, said rotatable cutter means having a pair of separate radially extending cutter blade means positioned in side-by-side relation and non-rotatably secured to said shaft, at least one of said cutter blade means being adjustably mounted on said shaft for preselected rotation relative to the other of said cutter blade means to thereby adjust the angular displacement between said separate cutter blade means, said rotatable cutter means positioned adjacent to said unitary fixed cutter blade so that upon rotation of said rotatable cutter means said radially extending cutter blade means move in a circular path and periodically move into cutting relation with said unitary fixed cutter blade, and said radially extending separate cutter blade means being angularly displaced from each other so that upon rotation of said rotatable cutter means one of said separ-ate cutter blade means moves into cutting relation with said unitary fixed cutter blade and thereafter the other rotatable cutter blade means moves into cutting relation with said unitary fixed cutter blade, and means to continuously move said segment through the cutter mechanism.
A rotatable cutter mechanism for cutting different length notches in a moving segment as set forth in claim 1 in which, said radially extending blade means first leading portion includes a rearwardly extending portion and said second trailing portion includes a forwardly extending por-tion, said forwardly extending portion positioned in over-lapped relation with said rearwardly extending portion.
A rotatable cutter mechanism for cutting different length notches in a moving segment as set forth in claim 2 in which, said rearwardly extending portion and said forwardly extending portions having substantially straight blade edge portions.
A rotatable cutter mechanism for cutting different length notches in a moving segment as set forth in claim 1 in which, said first leading portion having a blade edge portion arranged to cut an envelope blank seal flap side edge and a portion of an adjacent envelope blank bottom flap side edge in the side edge of a moving segment, and said second trailing edge portion having a plade edge portion to cut the remaining portion of said adjacent envelope blank bottom flap edge.
A rotatable cutter mechanism for cutting different length notches in a moving segment as set forth in claim 1 in which, said radially extending separate cutter blade means each includes a cutter blade, said cutter blades positioned in side-by-side relation.
A rotatable cutter mechanism for cutting different length notches in a moving segment as set forth in claim 5 which includes, separate cutter blade holders nonrotatably mounted on a rotatable shaft, said separate cutter blade holders mounted on said shaft adjacent to each other, at least one of said blade holders being adjustably mounted on said shaft for preselected rotation relative to the other of said blade holders to thereby adjust the angular displace-ment between said separate cutter blades.
A rotatable cutter mechanism for cutting different length notches in a moving segment as set forth in claim 1 which includes, a fixed cutter means mounted in a platform, blade side edge portions along opposite sides of said fixed cutter means, a pair of rotatable shafts mounted in parallel spaced relation on opposite sides of said fixed cutter means, said rotatable cutter means mounted on each of said shafts, said rotatable cutter means each having radially extending blade means operable upon rotation of said shafts to move in a circular path and once during each revolution of said shafts to move into cutting relation with the adjacent blade side edge portions of said fixed cutter means, and each of said radially extending blade means having a first leading portion angularly displaced from a second trailing portion being substantially the same for both radially extending blade means so that notches of substantially the same length are cut in a segment moving parallel to and between said rotat-able shafts.
A rotatable cutter mechanism for cutting different length notches in a moving segment as set forth in claim 7 in which, said first leading portions of both of said radially extending blade means arranged to cut envelope blank seal flap side edges and a portion of an adjacent envelope blank bottom flap side edge in opposite sides of said segment moving between said rotatable shafts, said second trailing portions of both of said radially extending blade means arranged to cut the remaining portions of said adjacent envelope blank bottom plap side edges in said segment.
A rotatable cutter mechanism as set forth in claim 1 in which said segment comprises a web.
A rotatable cutter mechanism as set forth in claim 1 in which said segment comprises a sheet having a predeter-mined length and width.
A method for cutting envelope blanks having bottom flap edges comprising, moving a segment along a platform at a preselected speed above a pair of fixed cutter blades, one of said fixed cutter blades positioned on one side of said moving segment and the other of said fixed cutter blades positioned on the other side of said moving segment, rotating a pair of shafts at a preselected speed, one of said shafts positioned on one side of said moving segment and the other of said shafts positioned on the other side of said moving segment, each of said shafts having a pair of blades extending radially therefrom, moving said pairs of radially extending blades mounted on each of said shafts on opposite sides of said segment in a circular path into abutting realation with said pair of fixed cutter blades to periodically cut envelope blank seal flap side edges and adjacent bottom flap side edges in the opposite sides of said moving segment, and varying the angular displacement between each said pair of radially extending blades while said blades are stationary to vary the effective cutting length of said pairs of blades to thereby vary the length of said bottom flap side edges cut in the opposite sides of said moving segment.
A method for cutting envelope blanks having bottom flap edges as set forth in claim 11 which lncludes, changing the angular displacement between a first leading portion and a second trailing portion of said radially extending blades to thereby change the time interval between the cutting operation of said first leading portion and second trailing portion to thereby change the length of said bottom flap side edges cut in the opposite sides of said moving segment.
A method for cutting envelope blanks having bottom flap edges as set forth in claim 11 in which, said moving segment comprises an endles web.
A method for cutting envelope blanks having bottom flap edges as set forth in claim 11 in which, said moving segment comprises a sheet having a predetermined length and width.
A method for cutting envelope blanks having bottom flap edges as set forth in claim 11 which includes, changing the angular displacement between a first portion and a second portion of said radially extending blades to thereby change the time interval between the cutting oper-ation of said first portion and said second portion to thereby change the length of said side edges cut in the opposite sides of said moving segment.
16. A rotary cutting apparatus for removing sections from a longitudinally advancing web of sheet material com-prising: a stationary cutting knife over which at least one side of the advancing web of sheet material passes in a cutting operation, the stationary knife having a cutting edge determining the contours of a section to be removed from the one side of the web; a first rotary knife having a cutting edge corresponding to at least part of the cutting edge of the stationary knife and supported for rotation about a rotational axis substantially parallel to the side of the advancing web and bringing the cutting edge of the first rotary knife and the stationary knife into cooperative cutting relatonship with the web of sheet material at the one side; a second rotary knife having a cutting edge corresponding to at least part of the cutting edge of the same stationary knife cooperating with the first knife and supported for rotation about the rotational axis of the first knife and in spaced relationship about the rotation-al axis to the first rotary knife to also bring the cutting edges of the second knife and the stationary knife into cooperative cutting relationship with the web of sheet material at the one side; and means for adjusting the spaced relationship of the first and second rotary knives about the rotational axis.
A rotary cutting apparatus as defined in claim 16 wherein the part of the cutting edge of the stationary knife corresponding in shape with the first rotary knife and the part of the cutting edge of the stationary knife corresponding in shape with the second rotary knife overlap.
A rotary cutting apparatus as defined in claim 17 wherein the spaced relationship of the first and second rotary knives about the rotational axis is an angular spacing no larger than the angular spacing causing the cuts of the first and second knives in the advancing web to be contiguous.
A rotary cutting apparatus as defined in claim 16 wherein the spaced relationship of the first and second rotary knives about the rotational axis is an angle defined by a ratio in which the numerator is the longitudinal length of the web cut by the second rotary knife and the denominator is the longitudinal length of the web between corresponding points of serially adjacent blanks cut by the apparatus.
A rotary cutting apparatus as defined in claim 16 further including an orbor shaft supported relative to the stationary knife for rotation about the rotational axis of the first and second rotary knives; and wherein the first and second rotary knives are mounted on and project radially from the arbor shaft.
A rotary cutting apparatus as defined in claim 20 further including a first clamp secured to the arbor shaft and mounting the first rotary knife to the shaft for rotation with the shaft; and a second clamp adjustably secured to the arbor shaft for angular adjustment about the shaft and mounting the second rotary knife to the shaft for rotation with the shaft and angular adjustment about the shaft relative to the first rotary knife.
A rotary cutting apparatus as defined in claim 21 wherein the first and second clamps are secured to the arbor shaft at axially adjacent stations; and a key is interposed between the first clamp and the shaft to hold the first clamp at a given angular position relative to the shaft.
.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US19823271A | 1971-11-12 | 1971-11-12 | |
| US198,232 | 1971-11-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1101780A true CA1101780A (en) | 1981-05-26 |
Family
ID=22732534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA156,089A Expired CA1101780A (en) | 1971-11-12 | 1972-11-09 | Rotatable cutter mechanism for cutting different length notches in a moving web |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3782233A (en) |
| CA (1) | CA1101780A (en) |
| DE (1) | DE2256467A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4016789A (en) * | 1974-10-16 | 1977-04-12 | F. L. Smithe Machine Company, Inc. | Drive for rotatable cutter mechanisms |
| DE2628728C2 (en) * | 1976-06-25 | 1986-04-17 | Winkler & Dünnebier, Maschinenfabrik und Eisengießerei GmbH & Co KG, 5450 Neuwied | Cutting device with rotating wing knives for the production of shaped cuts in the edges of moving material webs |
| US4601688A (en) * | 1983-04-06 | 1986-07-22 | Chapman Envelopes Limited | Apparatus for producing envelope blanks |
| US4832677A (en) * | 1986-02-14 | 1989-05-23 | Ami, Inc. | Method and apparatus for producing draw tape bags |
| US5062331A (en) * | 1989-08-07 | 1991-11-05 | Eastman Kodak Company | Apparatus and method for edge notching a continuously moving web |
| US5689986A (en) * | 1996-09-18 | 1997-11-25 | Jacobs, Jr.; John F. | Apparatus and method for prenotching and dimensionally measuring a roll formed part |
| US11052228B2 (en) | 2016-07-18 | 2021-07-06 | Scientia Vascular, Llc | Guidewire devices having shapeable tips and bypass cuts |
| US10583503B2 (en) * | 2017-01-18 | 2020-03-10 | Butech Bliss | Plunge slitting with enhanced scrap threading capability using notching shears |
| US20200345975A1 (en) * | 2019-05-02 | 2020-11-05 | Scientia Vascular, Llc | Intravascular device with enhanced one-beam cut pattern |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1567920A (en) * | 1925-12-29 | op chicago | ||
| US1394911A (en) * | 1921-10-25 | Shingle-cutting machine | ||
| NL101108C (en) * | 1958-07-10 |
-
1971
- 1971-11-12 US US00198232A patent/US3782233A/en not_active Expired - Lifetime
-
1972
- 1972-11-09 CA CA156,089A patent/CA1101780A/en not_active Expired
- 1972-11-17 DE DE2256467A patent/DE2256467A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE2256467A1 (en) | 1973-05-30 |
| US3782233A (en) | 1974-01-01 |
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