US20070261529A1 - Paper trimmer - Google Patents
Paper trimmer Download PDFInfo
- Publication number
- US20070261529A1 US20070261529A1 US11/880,789 US88078907A US2007261529A1 US 20070261529 A1 US20070261529 A1 US 20070261529A1 US 88078907 A US88078907 A US 88078907A US 2007261529 A1 US2007261529 A1 US 2007261529A1
- Authority
- US
- United States
- Prior art keywords
- carrier
- plate
- blade
- slot
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- 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
- B26D7/01—Means for holding or positioning work
- B26D7/015—Means for holding or positioning work for sheet material or piles of sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D35/00—Tools for shearing machines or shearing devices; Holders or chucks for shearing tools
- B23D35/008—Means for changing the cutting members
-
- 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
- B26D1/01—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 does not travel with the work
- B26D1/04—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 does not travel with the work having a linearly-movable cutting member
- B26D1/045—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 does not travel with the work having a linearly-movable cutting member 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
- B26D2007/0012—Details, accessories or auxiliary or special operations not otherwise provided for
- B26D2007/0087—Details, accessories or auxiliary or special operations not otherwise provided for for use on a desktop
-
- 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
- Y10T83/748—With work immobilizer
- Y10T83/7487—Means to clamp work
- Y10T83/7493—Combined with, peculiarly related to, other element
- Y10T83/7507—Guide for traveling cutter
-
- 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
- Y10T83/768—Rotatable disc tool pair or tool and carrier
- Y10T83/7755—Carrier for rotatable tool movable during cutting
- Y10T83/7763—Tool carrier reciprocable rectilinearly
-
- 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
- Y10T83/869—Means to drive or to guide tool
- Y10T83/8748—Tool displaceable to inactive position [e.g., for work loading]
- Y10T83/8749—By pivotal motion
-
- 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
- Y10T83/869—Means to drive or to guide tool
- Y10T83/8821—With simple rectilinear reciprocating motion only
- Y10T83/8822—Edge-to-edge of sheet or web [e.g., traveling cutter]
Definitions
- the present invention is directed to paper trimmers. More particularly, the present invention is related to a paper trimmer including a mechanism for cutting materials along a substantially straight line.
- Conventional paper cutters often include an elongated blade pivotally attached to a cutting board at one end.
- the elongated blade is lowered about the pivot, thereby cutting a paper or material by shearing action.
- the elongated blade is often exposed, posing a significant danger, especially for use by children.
- Another drawback of this type of cutter is the overall size which makes it difficult to easily and conveniently transport them for personal use.
- One style of paper cutter includes a blade attached to a carrier which is translated along a rail assembly.
- the rail assembly may be pivoted at one end to permit loading and unloading of the material to be cut as disclosed in U.S. Pat. No. 5,069,097 entitled “PAPER-CUTTING MACHINE AND METHOD OF CUTTING PAPER” to Mori issued on Dec. 3, 1991.
- the rail assembly may also be pivoted at both end of the rail assembly as disclosed in U.S. Pat. No. 5 , 322 , 001 assigned to assignee of the present application and entitled “PAPER CUTTER WITH CIRCULAR BLADES” to Boda issued on Jun. 21, 1994.
- the rail may also be stationary as disclosed in U.S. Pat. No.
- the present invention provides for a material trimmer comprising a base having a support surface and a cutting region having a channel.
- a plate is movably attached to the base and includes oppositely facing upper and lower surfaces, an elongated slot therethrough, an elevated portion proximate each side of the slot, and a distal second end with the elevated portion leading to an arcuate surface.
- a carrier includes a top flange having a pair of oppositely extending sides and a foot extending from the top flange. The foot is slidably received within the slot, and a portion of the pair of oppositely extending sides are arcuate in shape and slidably received within the arcuate surface of the elevated portion.
- a blade is attached to the carrier, a portion of which extends below the lower surface of the plate within the channel when the plate is disposed over the cutting region.
- the slot has a first width at the first and second ends thereof and a second width between the first and second ends, the first width being larger than the second width. The larger widths of the slot permit the user to easily insert and remove the carrier from the paper cutter.
- FIG. 1 is an isometric view of a paper trimmer with the plate in a lowered position
- FIG. 2A is an isometric view of the paper trimmer with the plate in a raised position
- FIG. 2B is a fragmentary exploded view of the plate and base
- FIG. 2C is a fragmentary cross-sectional view taken generally along line 2 C- 2 C of FIG. 2A ;
- FIG. 3 is a cross-sectional view taken generally along line 3 - 3 of FIG. 2A
- FIG. 4 is a cross-sectional view taken generally along line 4 - 4 of FIG. 1 ;
- FIG. 5 is an enlarged fragmentary cross-sectional view of FIG. 4 ;
- FIG. 6 is an exploded view of the blade assembly shown in the raised position
- FIG. 7 is an isometric view of the blade assembly shown in the lowered position
- FIG. 8 is an exploded view of the carrier and blade assembly
- FIG. 9 is a top view of a blade assembly of an alternative embodiment
- FIG. 10 is another top view of a blade assembly of another alternative embodiment
- FIG. 11 is an exploded cross sectional view of the carrier and plate in the lowered position taken generally along line 11 - 11 of FIG. 1 ;
- FIG. 12 is an isometric view of a paper trimmer including a rotatable measuring portion according to an alternate embodiment of the invention.
- FIG. 13 is a top view of the paper trimmer of FIG. 12 ;
- FIG. 14 is an exploded view of the paper trimmer of FIG. 12 ;
- FIG. 15 is a top view of the elongated plate of the paper trimmer of FIG. 12 ;
- FIG. 16 is a cross-sectional view of a paper trimmer plate according to an alternate embodiment of the invention.
- a paper trimmer constructed in accordance with the present invention is shown generally at 10 in FIGS. 1-2 .
- the paper trimmer 10 includes a base 12 and an elongated plate 14 pivotally attached to base 12 .
- a blade assembly 16 is attached to a carrier 18 .
- the carrier 18 is slidably attached to the elongated plate 14 .
- the base 12 includes a first side 20 and a second side 21 , the first side 20 and the second side 21 each include a recess 22 having an aperture 24 .
- Each recess 22 has a wall 26 near the aperture 24 .
- the base 12 also includes a top surface 28 having a cutting region 30 provided with a channel 32 extending substantially the entire distance between the first side 20 and the second side 21 .
- the top surface 28 also includes a support surface 34 .
- a pair of raised guides 36 are integrally formed with top surface 28 and are located near the first side 20 and the second side 21 .
- Each raised guide 36 includes a guide wall 38 normal to the top surface 28 .
- Each raised guide 36 also includes a first guide portion 36 a on one side of channel 32 and a second guide portion 36 b on the other side of the channel 32 .
- the top surface 28 also includes a plurality of grooves 40 forming a grid 42 .
- the grid 42 may take the form of printing lines instead of employing the grooves 40 . It is also possible to eliminate the grid 42 and the grooves 40 entirely.
- the top surface 28 may include one or more metric or English rulers formed in grooves or printed thereon. These rulers may aid the user in measuring and/or aligning the materials to be cut.
- the base 12 also includes an attachment edge 44 substantially normal to the first side 20 and the second side 21 .
- the attachment edge 44 includes a plurality of apertures 46 to permit attachment to a standard ring binder (not shown). Additionally, an alignment edge 47 is located substantially parallel to and distal from the attachment edge 46 .
- the elongated plate 14 includes an upper surface 48 , an oppositely facing lower surface 50 , a first end 52 , a second end 54 (see FIG. 1 ), and first and second edges 56 a , 56 b parallel to a longitudinal axis 58 of the elongated plate 14 .
- the elongated plate 14 also includes a slot 60 extending through the elongated plate 14 along longitudinal axis 58 .
- the slot 60 includes a pair of slot walls 62 and extends intermediate the first end 52 and second end 54 . As shown in FIGS.
- the upper surface 48 includes an angled and elevated portion 49 on each side of the slot 60 , with the elevation of the angled and elevated portion 49 increasing away from the slot 60 .
- the angled and elevated portion 49 terminates at the maximum elevation with an arcuate portion 51 before proceeding to the first and second edges 56 a and 56 b.
- the upper surface 48 may have other shapes as well such as a planar shape before the arcuate portion 51 .
- a scale 64 is printed on the upper surface 48 proximate the first and second edges 56 a , 56 b.
- the scale 64 may be etched into or otherwise formed integrally with the upper surface 48 .
- the elongated plate 14 further includes a top recess 66 proximate both sides of slot 60 .
- the lower surface 50 includes a bottom recess 68 in the vicinity of the slot 60 (see FIG. 3 ). As shown further in FIGS. 3-5 and 11 , the bottom recess 68 forms a track substantially parallel to the slot walls 62 .
- the lower surface 50 includes a pair of ribs 70 extending substantially parallel to the longitudinal axis 58 , with the ribs 70 being located proximate a side of the bottom recess 68 .
- Each of the ribs 70 includes a rib surface 72 raised from the lower surface 50 .
- Each of the ribs 70 also includes a pair of rib ends 74
- the elongated plate 14 also includes a first arm 76 attached to the first end 52 and a second arm 78 attached to the second end 54 (see FIG. 2A ).
- the first and second arms 76 , 78 are integrally formed with the first and second ends 52 , 54 respectively.
- the first and second arms 76 , 78 each extend downward from the lower surface 50 and beyond the first edge 56 a in a direction substantially normal to the longitudinal axis 58 .
- the first and second arms 76 , 78 each include an inner side 80 , an outer side 82 , a bottom edge 84 and a top edge 86 .
- the first and second arms 76 , 78 also include a post 88 , shown in FIG. 2A , extending from the inner side 80 .
- the elongated plate 14 is formed from a resilient material, such as plastic.
- the resilient material permits the first and second arms 76 , 78 to be conveniently forced apart such that the first and second arms 76 , 78 spring back to their original position when released.
- the slot 60 is of a nonuniform width.
- the slot 60 has a first width 302 adjacent both the first end 52 and the second end 54 , and a second width 304 in the portion of the slot 60 that is between the first end 52 and the second end 54 .
- the carrier 18 includes a foot 90 having a width less than that of the slot 60 at both the first width 302 and the second width 304 .
- the carrier 18 also includes a blind cavity 92 formed in the foot 90 and extending from a foot bottom 94 .
- the carrier 18 is also provided with a handle 99 (see FIG. 11 ).
- the carrier 18 is sized relative to the slot 60 such that the carrier can be positioned in the elongated plate 14 through the first width 302 of the slot, but can neither be directly positioned nor directly removed from the slot 60 to or from the second width 304 .
- the second width 304 is sized to form a snug relationship with the carrier 18 .
- the first width 302 has a width of about 0.320 inches, while the second width 304 has a width of about 0.260 inches. In this particular embodiment of the invention, there is a 0.005 inch clearance between the carrier 18 and the elongated plate 14
- the carrier 18 also includes a cylindrical portion 91 at each end thereof
- the cylindrical portion 91 is sized and position to engage the arcuate portions 51 of the elongated plate 14 .
- the centers of the two cylindrical portions 91 are about 0.797 inches away from each other and are positioned to correspond to the center of the radius of curvature of each of the arcuate portions 51 of the elongated plate. This correspondence permits the carrier 18 to glide along the elongated plate 14 in a substantially straight line.
- FIG. 16 An alternate embodiment of the elongated plate 14 is shown in FIG. 16
- the blade assembly 16 includes a blade 100 having a cutting edge 102 and a main portion 104 provided with an aperture 106 .
- the cutting edge 102 has an arcuate shape.
- the cutting edge 102 may be V-shaped with an apex 108 and a first and second cutting portion 110 diverging from the apex 108 (See FIG. 10 ).
- the angle formed by cutting portions 110 is approximately 45 degrees, although other angles are possible
- the blade assembly 16 also includes a blade holder 112 having a first portion 114 , a second portion 116 , and an integrally formed hinge 117 connecting the first and second potions 114 , 116 .
- the first and second portions 114 , 116 each include an outer surface 118 , an inner surface 120 and an holder edge 119 opposite the hinge 117 .
- Each of the first and second portions 114 , 116 include a depression 122 configured to receive a blade 100 .
- the depression 122 includes an opening 124 at the holder edge 119 .
- a stud 126 projecting from the depression 122 is integrally formed with the first portion 114 .
- the stud 126 may be integrally formed with the second portion 116 .
- a recess is located within the depression 122 of the second portion 116 to positively receive the stud 126 .
- a blade 100 ′ is spot welded to a metal member 130 ′ such that a portion of a cutting edge 128 ′ extends beyond a bottom edge of the metal member 130 ′.
- the assembly and operation of the paper trimmer 10 is generally as follows.
- the elongated plate 14 is pivotally attached to the base 12 by forcing the arms 76 , 78 apart such that the posts 88 are received within the apertures 24 .
- the elongated plate 14 is pivotally attached to the base 12 .
- the base 12 has a length along the longitudinal axis 58 substantially equal to the length of the elongated plate 14 .
- the base 12 has a width (normal to the longitudinal axis 58 ) greater than that of the elongated plate 14 such that the support surface 34 extends beyond the edges 56 a , 56 b. This aids in the stability and operation of the paper trimmer 10 .
- the upper surface 48 of the elongated plate 14 is facing away from the base 12 .
- the rib surface 72 of the ribs 70 is in contact with the top surface 28 of the base 12 .
- the outer sides 82 , 84 of each of the arms 76 , 78 are substantially flush with the first side 20 and the second side 21 of the base 12 .
- the elongated plate 14 is free to pivot from a lowered position. From the lowered position, the top edge 86 of the arms 76 , 78 are substantially flush with the top surface 28 of the base 12 , shown in FIG. 2 , to a raised or open position.
- each of the arms 76 , 78 are substantially normal to the top surface 28 , as shown in FIG. 3 .
- the top side 86 of the arms 76 , 78 are supported by the walls 26 , allowing the elongated plate 14 to remain substantially normal to the top surface 28 .
- the extension of the ribs 70 from the lower surface 50 aids to shield the blade 100 from a user when the elongated plate 14 is in the raised position.
- the blade 100 is attached to the blade holder 112 by positioning the blade aperture 106 over the stud 126 such that the blade cutting edge 102 extends beyond the opening 124 .
- the main portion 104 of the blade 100 is positively located within the depression 122 .
- the second portion 116 is folded about the hinge 117 such that the inner surfaces 120 are in contact. This feature is shown in FIGS. 6-7
- the blade assembly 16 is slidably attached within the cavity 92 of the carrier 18 .
- the blade holder 112 is press fit within the cavity 92 such that the holder edge 119 is substantially flush with the foot bottom 94 , and a portion 103 of the cutting edge 102 extends beyond the opening 124 .
- the holder edge 119 protrudes no more than about 0.005 inches from the foot bottom 94 .
- the cutting edge 102 extends approximately 0.015 inches below the foot bottom 94 of the carrier 18 . However, the cutting edge 102 may extend a greater or lesser distance below the foot 94 as well.
- the included angle of the cutting edge 102 is between about 30 and 40 degrees.
- the elongated plate 14 is preferably formed of a resilient material, aiding a portion of the carrier 18 to be placed through the slot 60 .
- the carrier 18 is slidably received within the slot 60 .
- the paper trimmer 10 may be stored in a ring binder (not shown) by attaching the rings to the apertures 46 .
- the paper trimmer 10 may be used either while attached to the ring binder or removed from the ring binder.
- a user first pivots the elongated plate 14 to the raised position as described above.
- the paper or like material to be cut is then placed on the support surface 28 of the base 12 such that the region where a cut is to be made overlies the channel 32 .
- the elongated plate 14 with the carrier 18 situated in a position proximate one of the ends 52 , 54 of the elongated plate 14 is then pivoted into the lowered position.
- the rib surface 72 of the ribs 70 are resting on the paper to be cut.
- the user slides the carrier 18 along the longitudinal axis 58 such that portion of the cutting edge 103 travels within the channel 32 as it traverses across the material.
- the symmetric nature of the cutting edge 102 permits translation and cutting of the material in either direction along the longitudinal axis 58 .
- the absence of grooves 40 in cutting region 30 aids in the smooth translation of the carrier 18 over the cutting region 30 during cutting of the material as the cylindrical portions 91 travel along the arcuate portions 51
- the elongated plate 14 may be hingedly connected to the base 12 .
- the elongated plate 14 may be connected at one end only such that the longitudinal axis 58 is substantially normal to the base 12 when the elongated plate 14 is in the raised position.
- the posts 88 may be formed on the base 12
- the apertures 24 may be formed on the arms 76 , 78 .
- the carrier 18 may have a groove intermediate the upper and lower surfaces 48 , 50 which receives a flange extending from the foot.
- the blade 100 may be located within the holder 112 by a combination of notches in the blade 100 and matching protrusions in the holder 112 .
- the paper trimmer 10 includes a rotatable portion 200 coupled to the base 12 in the vicinity of the attachment edge 44 .
- the rotatable portion 200 is capable of rotation about an axis substantially perpendicular to the longitudinal axis about which the elongated plate 14 rotates.
- the rotatable portion 200 may include features such as an English ruler 204 or a metric ruler 208 for measurement purposes, and could also be used to properly and accurately align the material to be cut.
- the rotatable portion 200 comprises a plastic base 212 fixedly attached to a hard surface 216 formed from a metal, although other types of materials may be used.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Details Of Cutting Devices (AREA)
- Nonmetal Cutting Devices (AREA)
- Handling Of Sheets (AREA)
- Knives (AREA)
Abstract
A material trimmer including a base having a support surface and a cutting region having a channel. A plate is movably attached to the base and includes oppositely facing upper and lower surfaces, an elongated slot therethrough, an elevated portion proximate each side of the slot, and a distal second end with the elevated portion leading to an arcuate surface. A carrier includes a top flange having a pair of oppositely extending sides and a foot extending from the top flange. The foot is slidably received within the slot, and a portion of the pair of oppositely extending sides are arcuate in shape and slidably received within the arcuate surface of the elevated portion. A blade is attached to the carrier, a portion of which extends below the lower surface of the plate within the channel when the plate is disposed over the cutting region.
Description
- The present application is a continuation of U.S. patent application Ser. No. 10/057,850, filed Jan. 25, 2002 and the contents of which are incorporated herein by reference in their entirety.
- The present invention is directed to paper trimmers. More particularly, the present invention is related to a paper trimmer including a mechanism for cutting materials along a substantially straight line.
- Devices for cutting or trimming sheet material utilizing different types of cutting blades are well known in the art. For example, early sheet cutting devices and mechanisms were found in industrial situations in which large rolls of sheet material needed to be cut. Different types of cutters or trimmers have been adapted for office or personal use.
- Conventional paper cutters often include an elongated blade pivotally attached to a cutting board at one end. In these “guillotine-type” cutters, the elongated blade is lowered about the pivot, thereby cutting a paper or material by shearing action. The elongated blade is often exposed, posing a significant danger, especially for use by children. Another drawback of this type of cutter is the overall size which makes it difficult to easily and conveniently transport them for personal use.
- One style of paper cutter includes a blade attached to a carrier which is translated along a rail assembly. The rail assembly may be pivoted at one end to permit loading and unloading of the material to be cut as disclosed in U.S. Pat. No. 5,069,097 entitled “PAPER-CUTTING MACHINE AND METHOD OF CUTTING PAPER” to Mori issued on Dec. 3, 1991. The rail assembly may also be pivoted at both end of the rail assembly as disclosed in U.S. Pat. No. 5,322,001 assigned to assignee of the present application and entitled “PAPER CUTTER WITH CIRCULAR BLADES” to Boda issued on Jun. 21, 1994. The rail may also be stationary as disclosed in U.S. Pat. No. 3,301,117 entitled “PAPER CUTTER” to Spaulding issued on Jan. 31, 1967. Attempts have also been made to combine a cutter with a ruler, while other cutting devices disclose a cutting member which is slidably guided within a slot in a ruler. The cutting member includes a rearward portion from which a blade is attached that is proximate the outside edge of the ruler.
- Many of the cutters described above employ a spring to activate the blade. For example, several of the patents noted above include blades that are forced into engagement by pressing on the carrier and depressing a spring. The blade is disengaged by releasing the carrier and allowing the spring to force the blade away from the cutting board. These assemblies require a number of components to house the springs.
- Another limitation of conventional cutters is the number of variables which may influence the straightness of the cut. Such cutters often employ a rail which would cut a straight line, but only if the rail was manufactured perfectly and actuated by the user with a consistent pressure in a straight down direction.
- It is therefore an object of the invention to provide an improved paper trimmer that consistently cuts the paper in substantially straight lines.
- It is another object of the invention to provide an improved paper trimmer that provides for a substantially straight cut even in the presence of varying forces applied to the blade carriage.
- It is still another object of the invention to provide an improved paper trimmer that is relatively simple to assemble.
- It is yet another object of the invention to provide an improved paper trimmer that is relatively simple to operate.
- It is finally another object of the invention to provide an improved paper trimmer with an increased level of safety.
- In accordance with the above objects and objects of the invention described hereinafter, the present invention provides for a material trimmer comprising a base having a support surface and a cutting region having a channel. A plate is movably attached to the base and includes oppositely facing upper and lower surfaces, an elongated slot therethrough, an elevated portion proximate each side of the slot, and a distal second end with the elevated portion leading to an arcuate surface. A carrier includes a top flange having a pair of oppositely extending sides and a foot extending from the top flange. The foot is slidably received within the slot, and a portion of the pair of oppositely extending sides are arcuate in shape and slidably received within the arcuate surface of the elevated portion. A blade is attached to the carrier, a portion of which extends below the lower surface of the plate within the channel when the plate is disposed over the cutting region. The slot has a first width at the first and second ends thereof and a second width between the first and second ends, the first width being larger than the second width. The larger widths of the slot permit the user to easily insert and remove the carrier from the paper cutter.
- The foregoing advantages and features of the invention will become apparent upon reference to the following detailed description and the accompanying drawings, of which:
-
FIG. 1 is an isometric view of a paper trimmer with the plate in a lowered position; -
FIG. 2A is an isometric view of the paper trimmer with the plate in a raised position;FIG. 2B is a fragmentary exploded view of the plate and base;FIG. 2C is a fragmentary cross-sectional view taken generally along line 2C-2C ofFIG. 2A ; -
FIG. 3 is a cross-sectional view taken generally along line 3-3 ofFIG. 2A -
FIG. 4 is a cross-sectional view taken generally along line 4-4 ofFIG. 1 ; -
FIG. 5 is an enlarged fragmentary cross-sectional view ofFIG. 4 ; -
FIG. 6 is an exploded view of the blade assembly shown in the raised position; -
FIG. 7 is an isometric view of the blade assembly shown in the lowered position; -
FIG. 8 is an exploded view of the carrier and blade assembly -
FIG. 9 is a top view of a blade assembly of an alternative embodiment; -
FIG. 10 is another top view of a blade assembly of another alternative embodiment; -
FIG. 11 is an exploded cross sectional view of the carrier and plate in the lowered position taken generally along line 11-11 ofFIG. 1 ; -
FIG. 12 is an isometric view of a paper trimmer including a rotatable measuring portion according to an alternate embodiment of the invention; -
FIG. 13 is a top view of the paper trimmer ofFIG. 12 ; -
FIG. 14 is an exploded view of the paper trimmer ofFIG. 12 ; -
FIG. 15 is a top view of the elongated plate of the paper trimmer ofFIG. 12 ; and -
FIG. 16 is a cross-sectional view of a paper trimmer plate according to an alternate embodiment of the invention. - A paper trimmer constructed in accordance with the present invention is shown generally at 10 in
FIGS. 1-2 . Thepaper trimmer 10 includes abase 12 and anelongated plate 14 pivotally attached tobase 12. Ablade assembly 16 is attached to acarrier 18. Thecarrier 18 is slidably attached to theelongated plate 14. - As shown in
FIGS. 1-3 thebase 12 includes afirst side 20 and asecond side 21, thefirst side 20 and thesecond side 21 each include arecess 22 having anaperture 24. Eachrecess 22 has awall 26 near theaperture 24. - The base 12 also includes a
top surface 28 having a cuttingregion 30 provided with achannel 32 extending substantially the entire distance between thefirst side 20 and thesecond side 21. Thetop surface 28 also includes asupport surface 34. A pair of raisedguides 36 are integrally formed withtop surface 28 and are located near thefirst side 20 and thesecond side 21. Each raisedguide 36 includes aguide wall 38 normal to thetop surface 28. Each raisedguide 36 also includes afirst guide portion 36 a on one side ofchannel 32 and asecond guide portion 36 b on the other side of thechannel 32. - In a preferred embodiment of the invention and as shown in
FIGS. 1-2 , thetop surface 28 also includes a plurality ofgrooves 40 forming agrid 42. However, there are nophysical grooves 40 in the vicinity of thechannel 32 in the cuttingregion 30. In an alternative embodiment of the invention, however, thegrid 42 may take the form of printing lines instead of employing thegrooves 40. It is also possible to eliminate thegrid 42 and thegrooves 40 entirely. Thetop surface 28 may include one or more metric or English rulers formed in grooves or printed thereon. These rulers may aid the user in measuring and/or aligning the materials to be cut. - The base 12 also includes an
attachment edge 44 substantially normal to thefirst side 20 and thesecond side 21. Theattachment edge 44 includes a plurality ofapertures 46 to permit attachment to a standard ring binder (not shown). Additionally, analignment edge 47 is located substantially parallel to and distal from theattachment edge 46. - As shown in
FIGS. 1-4 , theelongated plate 14 includes anupper surface 48, an oppositely facinglower surface 50, afirst end 52, a second end 54 (seeFIG. 1 ), and first andsecond edges longitudinal axis 58 of theelongated plate 14. As shown inFIGS. 1-3 , theelongated plate 14 also includes aslot 60 extending through theelongated plate 14 alonglongitudinal axis 58. Theslot 60 includes a pair ofslot walls 62 and extends intermediate thefirst end 52 andsecond end 54. As shown inFIGS. 3-4 , theupper surface 48 includes an angled andelevated portion 49 on each side of theslot 60, with the elevation of the angled andelevated portion 49 increasing away from theslot 60. The angled andelevated portion 49 terminates at the maximum elevation with anarcuate portion 51 before proceeding to the first andsecond edges upper surface 48 may have other shapes as well such as a planar shape before thearcuate portion 51. - In one embodiment of the invention, a
scale 64 is printed on theupper surface 48 proximate the first andsecond edges scale 64 may be etched into or otherwise formed integrally with theupper surface 48. Theelongated plate 14 further includes atop recess 66 proximate both sides ofslot 60. - The
lower surface 50 includes abottom recess 68 in the vicinity of the slot 60 (seeFIG. 3 ). As shown further inFIGS. 3-5 and 11, thebottom recess 68 forms a track substantially parallel to theslot walls 62. Thelower surface 50 includes a pair ofribs 70 extending substantially parallel to thelongitudinal axis 58, with theribs 70 being located proximate a side of thebottom recess 68. Each of theribs 70 includes arib surface 72 raised from thelower surface 50. Each of theribs 70 also includes a pair of rib ends 74 - The
elongated plate 14 also includes afirst arm 76 attached to thefirst end 52 and asecond arm 78 attached to the second end 54 (seeFIG. 2A ). In a preferred embodiment of the invention, the first andsecond arms second arms lower surface 50 and beyond thefirst edge 56 a in a direction substantially normal to thelongitudinal axis 58. The first andsecond arms inner side 80, anouter side 82, abottom edge 84 and atop edge 86. The first andsecond arms post 88, shown inFIG. 2A , extending from theinner side 80. - In one embodiment of the invention, the
elongated plate 14 is formed from a resilient material, such as plastic. The resilient material permits the first andsecond arms second arms - As shown in
FIG. 15 , theslot 60 is of a nonuniform width. In the embodiment shown, theslot 60 has afirst width 302 adjacent both thefirst end 52 and thesecond end 54, and asecond width 304 in the portion of theslot 60 that is between thefirst end 52 and thesecond end 54. - As shown in
FIGS. 3-5 and 15, thecarrier 18 includes afoot 90 having a width less than that of theslot 60 at both thefirst width 302 and thesecond width 304. Thecarrier 18 also includes ablind cavity 92 formed in thefoot 90 and extending from a foot bottom 94. In a preferred embodiment of the invention, thecarrier 18 is also provided with a handle 99 (seeFIG. 11 ). Thecarrier 18 is sized relative to theslot 60 such that the carrier can be positioned in theelongated plate 14 through thefirst width 302 of the slot, but can neither be directly positioned nor directly removed from theslot 60 to or from thesecond width 304. Thesecond width 304 is sized to form a snug relationship with thecarrier 18. In one preferred embodiment of the invention, thefirst width 302 has a width of about 0.320 inches, while thesecond width 304 has a width of about 0.260 inches. In this particular embodiment of the invention, there is a 0.005 inch clearance between thecarrier 18 and theelongated plate 14 - As shown in
FIG. 5 , thecarrier 18 also includes acylindrical portion 91 at each end thereof Thecylindrical portion 91 is sized and position to engage thearcuate portions 51 of theelongated plate 14. In a preferred embodiment of the invention, the centers of the twocylindrical portions 91 are about 0.797 inches away from each other and are positioned to correspond to the center of the radius of curvature of each of thearcuate portions 51 of the elongated plate. This correspondence permits thecarrier 18 to glide along theelongated plate 14 in a substantially straight line. Because of the positioning and alignment of thecylindrical portions 91 to thearcuate portions 51, thecarrier 18 is greatly hindered from lateral movement perpendicular to theslot 60, substantially regardless of the amount and degree of force imparted onto thecarrier 18. An alternate embodiment of theelongated plate 14 is shown inFIG. 16 - As shown in
FIGS. 6-7 , theblade assembly 16 includes ablade 100 having acutting edge 102 and amain portion 104 provided with anaperture 106. In a preferred embodiment of the invention, thecutting edge 102 has an arcuate shape. However other well known configurations may be used. For example, thecutting edge 102 may be V-shaped with an apex 108 and a first andsecond cutting portion 110 diverging from the apex 108 (SeeFIG. 10 ). In this alternative embodiment, the angle formed by cuttingportions 110 is approximately 45 degrees, although other angles are possible - The
blade assembly 16 also includes ablade holder 112 having afirst portion 114, asecond portion 116, and an integrally formedhinge 117 connecting the first andsecond potions second portions outer surface 118, aninner surface 120 and anholder edge 119 opposite thehinge 117. Each of the first andsecond portions depression 122 configured to receive ablade 100. Thedepression 122 includes anopening 124 at theholder edge 119. Astud 126 projecting from thedepression 122 is integrally formed with thefirst portion 114. Alternatively, thestud 126 may be integrally formed with thesecond portion 116. - In an alternative embodiment of the invention, a recess is located within the
depression 122 of thesecond portion 116 to positively receive thestud 126. In another alternative embodiment and as shown inFIGS. 9-10 ablade 100′ is spot welded to ametal member 130′ such that a portion of acutting edge 128′ extends beyond a bottom edge of themetal member 130′. - The assembly and operation of the
paper trimmer 10 is generally as follows. Theelongated plate 14 is pivotally attached to thebase 12 by forcing thearms posts 88 are received within theapertures 24. Theelongated plate 14 is pivotally attached to thebase 12. As illustrated inFIGS. 1-2 , thebase 12 has a length along thelongitudinal axis 58 substantially equal to the length of theelongated plate 14. Additionally, thebase 12 has a width (normal to the longitudinal axis 58) greater than that of theelongated plate 14 such that thesupport surface 34 extends beyond theedges paper trimmer 10. - In the lowered or closed position, and as shown in
FIG. 1 , theupper surface 48 of theelongated plate 14 is facing away from thebase 12. Similarly, therib surface 72 of theribs 70 is in contact with thetop surface 28 of thebase 12. Additionally, in the lowered position theouter sides arms first side 20 and thesecond side 21 of thebase 12. Theelongated plate 14 is free to pivot from a lowered position. From the lowered position, thetop edge 86 of thearms top surface 28 of thebase 12, shown inFIG. 2 , to a raised or open position. In the raised position, thetop edge 86 of each of thearms top surface 28, as shown inFIG. 3 . In the fully raised position, thetop side 86 of thearms walls 26, allowing theelongated plate 14 to remain substantially normal to thetop surface 28. The extension of theribs 70 from thelower surface 50 aids to shield theblade 100 from a user when theelongated plate 14 is in the raised position. - The
blade 100 is attached to theblade holder 112 by positioning theblade aperture 106 over thestud 126 such that theblade cutting edge 102 extends beyond theopening 124. Themain portion 104 of theblade 100 is positively located within thedepression 122. Thesecond portion 116 is folded about thehinge 117 such that theinner surfaces 120 are in contact. This feature is shown inFIGS. 6-7 - The
blade assembly 16 is slidably attached within thecavity 92 of thecarrier 18. In a preferred embodiment of the invention, theblade holder 112 is press fit within thecavity 92 such that theholder edge 119 is substantially flush with the foot bottom 94, and aportion 103 of thecutting edge 102 extends beyond theopening 124. Preferably, theholder edge 119 protrudes no more than about 0.005 inches from the foot bottom 94. In a preferred embodiment, thecutting edge 102 extends approximately 0.015 inches below thefoot bottom 94 of thecarrier 18. However, thecutting edge 102 may extend a greater or lesser distance below thefoot 94 as well. - In a most preferred embodiment of the invention, the included angle of the
cutting edge 102 is between about 30 and 40 degrees. Theelongated plate 14 is preferably formed of a resilient material, aiding a portion of thecarrier 18 to be placed through theslot 60. Thecarrier 18 is slidably received within theslot 60. - The
paper trimmer 10 may be stored in a ring binder (not shown) by attaching the rings to theapertures 46. Thepaper trimmer 10 may be used either while attached to the ring binder or removed from the ring binder. To cut paper or similar material, a user first pivots theelongated plate 14 to the raised position as described above. The paper or like material to be cut is then placed on thesupport surface 28 of the base 12 such that the region where a cut is to be made overlies thechannel 32. Theelongated plate 14 with thecarrier 18 situated in a position proximate one of theends elongated plate 14 is then pivoted into the lowered position. In the lowered position, therib surface 72 of theribs 70 are resting on the paper to be cut. To cut the material, the user slides thecarrier 18 along thelongitudinal axis 58 such that portion of thecutting edge 103 travels within thechannel 32 as it traverses across the material. The symmetric nature of thecutting edge 102 permits translation and cutting of the material in either direction along thelongitudinal axis 58. The absence ofgrooves 40 in cuttingregion 30 aids in the smooth translation of thecarrier 18 over the cuttingregion 30 during cutting of the material as thecylindrical portions 91 travel along thearcuate portions 51 - In an alternate embodiment of the invention, the
elongated plate 14 may be hingedly connected to thebase 12. Alternatively, theelongated plate 14 may be connected at one end only such that thelongitudinal axis 58 is substantially normal to the base 12 when theelongated plate 14 is in the raised position. Also, theposts 88 may be formed on thebase 12, and theapertures 24 may be formed on thearms carrier 18 may have a groove intermediate the upper andlower surfaces blade 100 may be located within theholder 112 by a combination of notches in theblade 100 and matching protrusions in theholder 112. - In an alternate embodiment of the invention and as shown in
FIGS. 12-14 , thepaper trimmer 10 includes arotatable portion 200 coupled to the base 12 in the vicinity of theattachment edge 44. Therotatable portion 200 is capable of rotation about an axis substantially perpendicular to the longitudinal axis about which theelongated plate 14 rotates. Therotatable portion 200 may include features such as anEnglish ruler 204 or ametric ruler 208 for measurement purposes, and could also be used to properly and accurately align the material to be cut. In one embodiment of the invention, therotatable portion 200 comprises aplastic base 212 fixedly attached to ahard surface 216 formed from a metal, although other types of materials may be used. - It should be understood that the above description of the invention and specific examples and embodiments, while indicating the preferred embodiments of the present invention are given by demonstration and not limitation. For example, the dimensions and clearances for the various components of the
elongated plate 14, thecarrier 18 and theslot 60 may be varied depending upon the particular manufacturing and design requirements, and the types of materials used for the individual components may also vary. Many changes and modifications within the scope of the present invention may therefore be made without departing from the spirit of the invention, and the present invention includes all such changes and modifications.
Claims (20)
1. A material trimmer, comprising:
a base including a support surface and a cutting region;
a plate pivotally attached to the base and including an upper surface and a lower surface, the lower surface shaped to correspond to at least a portion of the support surface of the base;
a carrier being movably engaged with the plate, the carrier including first and second cylindrical portions on opposite sides thereof; and
a blade attached to the carrier, a portion of the blade extending below the lower surface of the plate when the plate is disposed over the cutting region, wherein the plate includes arcuate portions corresponding to the cylindrical portions of the carrier such that the carrier travels along the plate via the interaction of the cylindrical portions with the arcuate portions.
2. The material trimmer of claim 1 , wherein the carrier movably engages a slot within the plate, and wherein the carrier includes a top flange having a width greater than that of the slot and a bottom flange having a width greater than that of the slot.
3. The material trimmer of claim 2 wherein the lower surface includes a recessed track formed proximate the slot for receiving the bottom flange of the carrier.
4. The material trimmer of claim 3 wherein the lower surface includes a pair of ribs proximate the recessed track.
5. The material trimmer of claim 1 , wherein the plate comprises a resilient material.
6. The material trimmer of claim 1 , wherein the base includes an attachment edge having a plurality of apertures configured for attachment to a ring binder.
7. The material trimmer of claim 1 , wherein the support surface includes a raised guide proximate one of the sides to align material to be cut.
8. The material trimmer of claim 1 , further comprising a blade assembly including a blade holder having a first portion and a second portion movably connected to the first portion, the blade holder configured to positively locate the blade within the first and second portions, the carrier including a cavity to receive the blade assembly.
9. The material trimmer of claim 8 , wherein blade holder includes a stud attached to one of the first portion and the second portion of the blade holder, the blade including a cutting edge and a foot having an aperture sized to receive the stud.
10. The material trimmer of claim 9 , wherein the blade cutting edge is arcuate.
11. The material trimmer of claim 10 , wherein the blade cutting edge has an apex formed at the juncture of a first cutting portion and a second cutting portion diverging away from one another thereby permitting the user to cut material by movement of the carrier in either direction along the longitudinal axis.
12. A material trimmer, comprising:
a base including a support surface and a cutting region;
a plate pivotally attached to the base and including an upper surface and a lower surface, the lower surface shaped to correspond to at least a portion of the support surface of the base;
a carrier being removably engaged with the plate, the carrier including a set of arcuate portions on opposite sides thereof; and
a blade operatively connected to the carrier, a portion of the blade extending below the lower surface of the plate when the plate is disposed over the cutting region,
wherein the plate includes a set of circular portions corresponding to the set of arcuate portions of the carrier such that the carrier travels along the plate via the interaction of the set of arcuate portions and the set of circular portions.
13. The material trimmer of claim 12 , wherein the carrier movably engages a slot within the plate, and wherein the carrier includes a top flange having a width greater than that of the slot and a bottom flange having a width greater than that of the slot.
14. The material trimmer of claim 13 wherein the lower surface includes a recessed track formed proximate the slot for receiving the bottom flange of the carrier.
15. The material trimmer of claim 14 wherein the lower surface includes a pair of ribs proximate the recessed track.
16. The material trimmer of claim 12 , wherein the plate comprises a resilient material.
17. The material trimmer of claim 12 , wherein the base includes an attachment edge having a plurality of aperture configured for attachment to a ring binder.
18. The material trimmer of claim 12 , wherein the support surface includes a raised guide proximate one of the sides to align material to be cut.
19. A material trimmer comprising:
a base having a support surface with a cutting region;
a plate movably attached to the base and including:
oppositely facing upper and lower surfaces,
an elongated slot therethrough,
an elevated portion proximate each side of the slot, the elevated portion leading to an arcuate surface, and
a distal second end;
a carrier including a top flange having a pair of oppositely extending sides, a foot extending from the top flange, the foot being received within the slot; and
a blade operatively connected to the carrier, a portion of the blade extending below the plate when the plate is disposed over the cutting region,
wherein the plate includes a set of circular portions corresponding to the set of arcuate portions of the carrier such that the carrier travels along the plate via the interaction of the set of arcuate portions and the set of circular portions.
20. The material trimmer of claim 19 , further comprising: a blade assembly including a blade holder having a first portion and a second portion movably connected to the first portion, the blade holder configured to positively locate the blade within the first and second portions, the carrier including a cavity to receive the blade assembly.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US11/880,789 US20070261529A1 (en) | 2002-01-25 | 2007-07-24 | Paper trimmer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US11/880,789 US20070261529A1 (en) | 2002-01-25 | 2007-07-24 | Paper trimmer |
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US10/057,850 Continuation US7299731B2 (en) | 2002-01-25 | 2002-01-25 | Paper trimmer |
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US20070261529A1 true US20070261529A1 (en) | 2007-11-15 |
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US11/880,789 Abandoned US20070261529A1 (en) | 2002-01-25 | 2007-07-24 | Paper trimmer |
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US10/057,850 Expired - Lifetime US7299731B2 (en) | 2002-01-25 | 2002-01-25 | Paper trimmer |
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EP (1) | EP1467830B1 (en) |
AT (1) | ATE333960T1 (en) |
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CA (1) | CA2473636C (en) |
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- 2003-01-24 WO PCT/US2003/002348 patent/WO2003064092A1/en active IP Right Grant
- 2003-01-24 CA CA 2473636 patent/CA2473636C/en not_active Expired - Lifetime
- 2003-01-24 DE DE2003607047 patent/DE60307047T2/en not_active Expired - Fee Related
- 2003-01-24 EP EP20030705920 patent/EP1467830B1/en not_active Expired - Lifetime
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Cited By (6)
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US20080034936A1 (en) * | 2006-06-14 | 2008-02-14 | Bernd Loibl | Rotary cutting unit for trimming sheet material |
US7878099B2 (en) * | 2006-06-14 | 2011-02-01 | Monolith Gmbh Burosysteme | Rotary cutting unit for trimming sheet material |
CN102233592A (en) * | 2010-04-26 | 2011-11-09 | 鸿富锦精密工业(深圳)有限公司 | Cutter and shearing machine with same |
US8857301B2 (en) | 2012-04-11 | 2014-10-14 | Xerox Corporation | Blade clearance groove for cutting plotter |
US10245803B2 (en) | 2013-03-13 | 2019-04-02 | Xerox Corporation | Apparatus, system and method for cutting and creasing media |
KR101340381B1 (en) * | 2013-07-15 | 2013-12-11 | 주식회사 동일이티씨 | Paper cutting apparatus |
Also Published As
Publication number | Publication date |
---|---|
CA2473636A1 (en) | 2003-08-07 |
CA2473636C (en) | 2010-06-22 |
US20030140761A1 (en) | 2003-07-31 |
AU2003207693B2 (en) | 2008-03-20 |
DE60307047T2 (en) | 2007-02-22 |
DE60307047D1 (en) | 2006-09-07 |
EP1467830A1 (en) | 2004-10-20 |
EP1467830B1 (en) | 2006-07-26 |
US7299731B2 (en) | 2007-11-27 |
WO2003064092A1 (en) | 2003-08-07 |
AU2008202712A1 (en) | 2008-07-10 |
ATE333960T1 (en) | 2006-08-15 |
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Legal Events
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AS | Assignment |
Owner name: ALTERRA HOLDINGS CORPORATION, OREGON Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SCHULZ, WILLIAM J.;REEL/FRAME:022823/0863 Effective date: 20020302 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |