Patent Grant
9321181
The present invention relates to a lamina cutting device. More particularly, the present invention relates to a portable, manual shape cutting device for cutting a wide variety of lamina material into shapes.
Numerous manual, hand driven tools for cutting similar material have been provided in prior art. For example U.S. Pat. No. 3,137,192, U.S. Pat. No. 3,513,744, U.S. Pat. No. 3,859,725, U.S. Pat. No. 4,062,116, U.S. Pat. No. 5,438,757, U.S. Pat. No. 6,112,417, U.S. Pat. No. 6,226,824, U.S. Pat. No. 6,684,512, U.S. Pat. No. 6,952,878, U.S. Pat. No. 8,220,162, US Pat No 20080250654, GB Pat No 2277705A. While these units may be suitable for the particular purpose to which they address, they would not be suitable for the purposes of the present invention as heretofore described.
U.S. Pat. No. 3,137,192 issued to Mcneill Robert M on Jun. 16, 1964 titled Material cutting device discloses a device designed to cut paper and the like and, more particularly, to a cutting head and rail which accurately and reproducibly cut materials of a wide variety of thickness and finish. In case of this device, the material being cut is held firmly in position to produce accurate and reproducible cuts without the necessity for manually holding or adjusting the material to compensate for the shifting of position of the material caused by the build-up of unbalancing forces during the cutting operation.
U.S. Pat. No. 3,513,744 issued to Hershberger Paul R on May 26, 1970 titled Map or chart cutter discloses a device for cutting out a portion of a large map or navigation chart, the portion so cut out being of interest to personnel of a vehicle travelling between two locations represented by points on the map. A carriage mounted on rollers supports a pair of spaced-apart cutting edges which, as the carriage is manually moved along a guide overlying the two points of interest on the map, cuts out from the latter a strip which can be conveniently handled by personnel of the vehicle without being encumbered with the remaining map portion which contains nothing of interest insofar as this particular journey of the vehicle is concerned.
U.S. Pat. No. 3,859,725 issued to Alexander Gilbert L on Jan. 14, 1975 titled Carpet cutting tool discloses a manually operated carpet cutting tool wherein a pair of spaced carpet receiving jaw members have transversely extending there between a cutting blade having its cutting edge sloping rearwardly and being held at its rearward edge in a slot provided in a pile comb. A cut pressure and cutting start member parallels each side of the jaws and is mounted at one end thereof for pivotal motion to initiate cutting.
U.S. Pat. No. 4,062,116 issued to Arnott Gertrude V on Dec. 13, 1977 titled Fabric cutting tool discloses a fabric cutting tool comprising an elongated shank curved and bifurcated at one end and a handle on the other, the bifurcated end having a spring loaded rotary cutting blade rollingly mounted between the bifurcation, a protective shield for the blade, a pair of guide wheels for assisting in the cutting, and a foot plate providing a cutting surface for the fabric
U.S. Pat. No. 5,438,757 issued to Weschenfelder; Sonja on Aug. 8, 1995 titled Multifunction cutting tool discloses a multifunction cutting tool which includes a cutting head adjustable for straight, free form or circular cutting of glass and tile, interchangeably mountable hobby and hook blades for cutting carpet, PVC, matting and the like, a roller cutter for cutting cloth, wallpaper, leather and similar sheet material, knife and scissor sharpeners and an angled carpet cutter blade mounted in a carriage with a base plate for sliding under the carpet. The tool has blade guards to protect the user from accidental injury and brackets supporting the cutting blades that are stabilized by resilient snap fittings and laterally extending support shoulders. Access to retractable folding hobby and hook blades is improved by the addition of screwdriver tip receiving pivot slots in the blades and the work surface of circular cuts is protected by a suction cup having a recessed and covered metal attachment.
U.S. Pat. No. 6,112,417 issued to Hyer; Michael L. on Sep. 5, 2000 titled Precision vinyl & carpet trimmer discloses a hand operated trimmer for trimming an edge of vinyl, carpet or the like being installed on a floor so that the cut edge of the floor covering will lie closely against an adjacent wall. The trimmer comprises an elongate base member and an integral cutting blade. The base member has a generally triangularly shaped cross section, with two of the elongate external surfaces of the base member meeting at a right angle, and the elongate external surface opposite the right angle being a concave surface. The cutting blade is mounted closely adjacent the concave surface and in a substantially perpendicular relationship thereto. Pressure applying rollers are spaced a slight distance from the concave surface so as to define a vinyl-receiving entry location for a vinyl sheet to pass in a longitudinal direction along the concave surface, with the pressure applying rollers serving to keep the vinyl sheet in close contact with the concave surface. The cutting blade is mounted in alignment with the path of travel of the vinyl along the concave surface, whereby upon an installer causing a vinyl sheet to enter the entry location, the external surfaces of the base member meeting at a right angle can be moved longitudinally along the floor-wall intersection. At that time the blade cuts the vinyl at a location coinciding with the intersection of the floor with the adjacent wall, such that the cut edge of the vinyl will reside closely and evenly along the wall.
U.S. Pat. No. 6,226,824 issued to Eric J. Hopson on May 8, 2001 titled Knife with multiple roller wheels discloses a knife with multiple roller wheels comprising an elongate hollow housing adapted to be held and operated by one hand. The housing has a first end with a slot and an opposite second end. A knife blade is provided. A structure is for retractably extending the knife blade from the slot in the first end of the housing to trim a window screen. Two roller wheels are also provided. A facility is for rotatably supporting in spaced apart relationships the two roller wheels. An assembly pivotally connects the supporting facility to one side of the housing adjacent to the second end. A stop member supports the supporting facility in a stationary position, so that one of the roller wheels will extend beyond the second end of the housing to install the window screen in a window screen frame.
U.S. Pat. No. 6,684,512 issued to Kathryn M. Bareis on Feb. 3, 2004 titled Rolling sheet material cutting device discloses a rolling device for cutting sheet material including a planar body member supported vertically on wheeled axles oriented perpendicularly to the vertical planar body member. The planar body member includes a cutting notch and a contained cutting blade member with a cutting edge exposed within the cutting notch. A handle member is secured to the planar body member and extends upwardly opposite the wheeled axles. A crossbar can be attached to the handle member. A user grasps the handle member, or crossbar, and rolls the planar body member forward on the wheeled axles to cut a sheet of material passing into the cutting notch
U.S. Pat. No. 6,952,878 issued to Bareis Kathryn on Oct. 11, 2005 titled Mobile sheet material cutting device discloses a self-standing mobile device for cutting sheet material including a body member connected to at least one wheeled axle to translationally move the body member about a surface on which the device self-stands. The body member includes a cutting notch with open and closed ends, the cutting notch positioned with the open end above the at least one wheeled axle. The body member including a contained cutting blade member with cutting edge exposed within the cutting notch closed end, the cutting blade member oriented substantially perpendicularly to the surface on which the device self-stands. A user may engage the device to move the device about the surface on the at least one wheeled axle to cut a sheet of material passing into the cutting notch. Handle and shoulder features, and related methods of cutting sheet material are also disclosed.
U.S. Pat. No. 8,220,162 issued to Rayner Design Pty Ltd on Jul. 17, 2012 titled Cutter device discloses a manually operable cutter device for cutting flexible sheet material, the cutter device comprising a cutter body and a cutting blade assembly operatively mounted to the cutter body and including a rotatable cutter blade having a peripheral edge portion and a fixed cutter blade adapted to cooperate together to provide a cutting zone in which sheet material can be cut. The rotatable cutting blade is mounted for rotation about an axis which extends generally laterally with respect to a normal feed direction of the sheet material to the cutting zone and the direction of rotation of the peripheral edge portion through the cutting zone is in the normal feed direction.
US20080250654 issued to Pi-Chao Chang on Oct. 16, 2008 titled Dual-use knife discloses a device having a circular blade and a guide rod combined together. A dual-use knife having a circular blade and a guide rod combined together. When the rotatable circular blade is attached to a cloth-cutting guide rode a positioning cutting state of the stationary circular blade can be obtained so that the application range of the circular blade can be enlarged. In addition, the circular blade or the combination of the cloth-cutting guide rod and the circular blade can be positioned and operated on two sides of the knife so that the knife may be properly held by left and right hands. In addition, when the circular blade is combined with the guide rod, a circular blade upper cover can be rotated so that the position of the cutting point of the circular blade may be arbitrarily changed from 0 to 360 degrees, and a multi-function knife may be formed.
GB2277705A titled Kitchen packaging cutter discloses a kitchen packaging cutter has a replaceable blade 2 clamped by a plate 3 to a body 1. A guide slot 6 is formed through the body length. A free turning roller 4 protrudes slightly over the guide slot 6 with a cutting edge of the blade 2 just clearing roller 4. The guide slot allows plastic food packs and cartons with varying flange measurements to pass between the cutting blade and roller to facilitate the cutting of the package and subsequent release of its contents. A second protruding cutting edge of blade 2 is sighted to the left of the body in right angle 7 and enables the opening of cardboard boxes, whether wrapped in plastic or cellophane, with little effort. A push-pull blade guard 9 may be fitted to the body to guard the second cutting edge.
The cutting device according to the present invention is especially designed to cut lamina materials into shapes, at the same time due to its design it is safe, efficient, conveniently mobile and very easy to use.
One object of the present invention is to provide a hand held manually driven cutting device especially designed for shape cutting of lamina materials that in most situations is able to cut as quickly and accurately as scissors, craft knives, battery and manual powered rotating knife's. At the same time, due to its design, the cutting device of the present invention is cheaply available to the end user. Furthermore, unlike alternative cutting knives, it performs a cutting operation whilst eliminating the risk of injury to the operator.
Another object is to provide a hand held manually driven cutting device that is able to cut at an acute radius or angle a lamina material without compromising operating time constraints and accuracy.
Still another object is to provide an ambidextrous shape cutting device that can be operated using a single hand with equal facility by either hand.
A further object is to provide a shape cutting device for which it is possible to use commonly available cutting blades such as the blades found in low cost craft knives.
A still further object is to provide a shape cutting device having an ergonomic design.
A still further object is to provide a shape cutting device having a graspable body that is dividable into two parts along its vertical axis.
Yet another object is to provide a shape cutting device with a wedge shaped material lifting and supporting element that extends from the underside of the graspable body wherein the lifting and supporting element is clamped into position when both parts of the graspable body are joined together by means of screws.
A still further object is to provide a shape cutting device that, during operation and storage, prevents any possibility of accidental human contact with the knife blade. A still further object is to provide a shape cutting device that during operation, the lifting and supporting element combined with the outer walls of the front substantially triangular portion of the substantially pistol shaped graspable body assembly are arranged to prevent any possibility of accidental human contact with the knife blade.
Yet another object is to provide a shape cutting device that prevents the point of the knife blade from causing any undercut scoring or damage upon the working surface.
A still further object is to provide a shape cutting device wherein the possibility of nicking or movement of the material during the cutting process is considerably diminished.
A still further object is to provide a shape cutting device that utilizes a cutting blade positioned at the center in between a pair of wheels with the cutting edge of the blade lying in line with the axle of the pair of wheels.
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed invention. This summary is not an extensive overview, and it is not intended to identify key/critical elements or to delineate the scope thereof. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
Accordingly, there is provided a hand driven shape cutting device wherein the graspable body is of substantially pistol shape having a front substantially triangular portion and a rear substantially rectangular portion protruding rearward forming a graspable handle so that, when the device is clasped by the hand of a user to impart a forwardly actuating force, the front substantially triangular portion defines an inclined force entry direction whereby, in association with the actuating rolling motion, clamping down force is applied through the wheels onto the material to be cut.
The hand held cutting device comprises a two part dividable opposing sides, each opposing sides having a mirror image outer surface and periphery that, when coupled with its partner, results in an assembly forming an ambidextrous graspable handle; a knife blade clamped firmly between the two substantially pistol shaped body parts with its cutting edge protruding forwardly beneath the front substantially triangular portion of the substantially pistol shaped body assembly; a pair of wheels, each wheel attached to an axle, situated to lower rear distal point on either outer side of the front substantially triangular portion of the substantially pistol shaped body assembly; a lifting and supporting element also referred to as a wedge member extending from the underside of the front substantially triangular portion wherein an engagement space for material to be lifted is apportioned between the distal front edge of the lifting and supporting element and the forward distal point of the front substantially triangular portion facing the direction of travel, the lifting and supporting element is arranged to lift the material to be cut and also form a protecting periphery such that any part of cutting edge of the knife does not protrude outside the periphery; the knife blade and supporting element are supported and clamped in position by the two substantially pistol shaped body parts which are detachably joined together by one or more fasteners. To improve cutting ability of the hand driven cutting device of the present invention, the flow passages on the upper surface of the lifting and supporting element are inclined, the leading edge of the flow passage being flush at the distal front upper surface of said lifting and supporting element, the flow passage extending rearward with an upward inclination to peak upon adjacent sides of the knife blade such that when the hand driven cutting device is driven forward, wherein material to be cut is introduced upon the leading edge of the lifting and supporting element, the flow passage guides the material to be cut into an actuated pincer and shearing action between the crest of the flow passage, the peripheral underside of the substantially pistol shaped body assembly and the cutting edge of the knife blade. The substantially pistol shaped body is provided with smoothly curved peripheral surface that provides graspable comfort for the operator, a graspable handle being the rearmost outer body periphery, extending outward and downwardly inclined from the irregular altitudinal apex of the substantially pistol shaped body assembly and rear-wardly away from the body distal point, the distal point being the front of the cutting device and direction of travel.
The two part body has symmetrical features to enable practical use by both left and right handed operator; the two part body is detachable/attachable to allow for interchanging the knife blade. The wheels are positioned to the outer lower periphery of the blade housing on opposing sides and in line with the cutting edge of the knife blade, whereby during the cutting process, in addition to enabling the cutter to travel, the wheels substantially clamp in position the material to be cut during the moment the material meets with the knife blade.
The wheels have a soft synthetic material on their outer perimeter to allow frictional gripping to take place upon the upper surface of the material to be cut. The knife blade to be clamped in the body is a replaceable type such as those commonly found in low cost craft knives.
To the accomplishment of the foregoing and related ends, certain illustrative aspects of the disclosed invention are described herein in connection with the following description and the annexed drawings. These aspects are indicative, however, of but a few of the various ways in which the principles disclosed herein can be employed and is intended to include all such aspects and their equivalents. Other advantages and novel features will become apparent from the following detailed description when considered in conjunction with the drawings.
The foregoing features, objects and advantages of the invention will become apparent to those skilled in the art from the following detailed description of a preferred embodiment, especially when considered in conjunction with accompanying drawings in which like numerals in the several views refer to corresponding parts.
Turning now descriptive to the drawings, in which similar reference characters denote similar elements throughout the several views,
In a preferred embodiment, the two opposing sides (10, 11) are detachably attached together by suitable one or more fasteners such as screws (12), (13) and (14) as shown in
Reference to
Reference to
The wedge member (19) defines a flow passage for the material to be cut during the cutting action so that the cut materials, after being cut by the knife blade (20), pass through either side of the knife blade (20). In a preferred embodiment, the bottom side (33) of the wedge member (19) remains substantially flush with bottom (34) of the pair of wheels (15) and (16) as shown in
The outer side of the front substantially triangular portion (29) in combination with the wedge member (19) forms a protective periphery around the cutting blade (20) which precludes physical contact of a person with the knife blade (20) during the use of the hand driven cutting device (100) of the present invention.
Reference to
Reference to
When the cutting device (100) is further moved forward, the edge of the material (72) picked up by the wedge member (19) climbs up the wedge member (19) over its top side (74) towards the second end (79) and reaches the space (77) provided between the top side (74) of the wedge member (19) and the bottom surface (32) of the substantially triangular portion (29). The material (72), at one point of time, during the movement of the cutting device (100), comes closer to the cutting edge (22) of the cutting blade (20). The cutting blade (20) is received in an interior cavity defined by the opposing sides (10, 11) of the body and extends through the bottom surface (32) of the substantially triangular portion (29) and into the space (77) so that a portion of the cutting edge (22) of the cutting blade (20) remains exposed. At the same time, reference to
Reference to
Since the cutting device (100) moves on a single pair of wheels (15) and (16), the cutting device (100) can move at any angle on the work surface. The ambidextrous graspable handle provided by the rear substantially rectangular portion (30) of the cutting device (100) enables a user to use just a single hand to drive and manoeuvre the cutting device (100) to make cuts on the material at a straight line or at any desired angle.
Since, the bottom tip (76) of the cutting blade (20) lies below the surface of the top side (74) in the slot (62), it ensures that the material (72) to be cut always comes in full contact with the cutting edge (22). If the bottom tip (76) remains on or above the surface of the top side (74), the cutting blade (20) may not be able to impart a proper cut on the material (72) or it may cause incomplete cut or scoring on the material.
The cutting blade (20) is angled upward from the top side (74) so that the cutting blade (20) resists the lamina material (72) being cut from moving upward which is likely to happen when the cut occurs.
The cutting edge (22) of the cutting blade (20) remains exposed only in the space (77) and this space (77) is so small that the cutting edge (22) or any portion of the cutting blade (20) cannot be touched by fingers of a user even if attempted.
The knife blade (20) is any suitable knife blade known in the art. To replace the knife blade (20) when it becomes blunt, the first and second opposing sides (10) and (11) are detached by removing the fasteners (12), (13) and (14). Examples of the work piece material i.e. the lamina material cut into different regular and irregular shapes by the hand driven cutting device (100) of the present invention includes, but is not limited to, PVC and foils, vinyl membranes, technical textiles, papers, cards and the like.
It is noted that the embodiment of the hand driven cutting device with a pair of wheels described herein in detail for exemplary purpose is of course subject to many different variations in structure, design, application and methodology. Because many varying and different embodiments may be made within the scope of inventive concepts herein taught, and because many modifications may be made in the embodiment herein detailed in accordance with the descriptive requirements of the law, it is to be understood that the details herein are to be interpreted as illustrative and not in a limiting sense.
This application is a continuation-in-part of U.S. patent application Ser. No. 14/275,228 filed on May 12, 2014, which application is incorporated in its entirety herein by reference.
| Number | Name | Date | Kind |
|---|---|---|---|
| 2439639 | Tilly | Apr 1948 | A |
| 2535555 | Tilly | Dec 1950 | A |
| 3137192 | Mcneill | Jun 1964 | A |
| 3286351 | McAlister | Nov 1966 | A |
| 3365798 | Cunningham | Jan 1968 | A |
| 3380159 | Winston | Apr 1968 | A |
| 3513744 | Hershberger | May 1970 | A |
| 3613241 | Allen | Oct 1971 | A |
| 3859725 | Anderson | Jan 1975 | A |
| 3921287 | Gomez | Nov 1975 | A |
| 3934342 | Matsushita | Jan 1976 | A |
| 4062116 | Arnott | Dec 1977 | A |
| 4068375 | Rathbun | Jan 1978 | A |
| 4109380 | Anderson | Aug 1978 | A |
| 4385440 | Webb | May 1983 | A |
| 4884342 | McNamara | Dec 1989 | A |
| 5174028 | Seltzer, Jr. | Dec 1992 | A |
| 5347719 | Scharf | Sep 1994 | A |
| 5419044 | Valliere | May 1995 | A |
| 5438757 | Weschenfelder | Aug 1995 | A |
| 5638603 | Li | Jun 1997 | A |
| D418036 | Shearer | Dec 1999 | S |
| 6112417 | Hyer | Sep 2000 | A |
| 6226824 | Hopson | May 2001 | B1 |
| 6684512 | Bareis | Feb 2004 | B1 |
| 6748659 | Street | Jun 2004 | B1 |
| 6857192 | Summers | Feb 2005 | B1 |
| 6952878 | Bareis | Oct 2005 | B1 |
| 7051443 | Mueller | May 2006 | B2 |
| 7526865 | Mueller | May 2009 | B2 |
| D649854 | Packard | Dec 2011 | S |
| 8220162 | Rayner | Jul 2012 | B2 |
| 8495818 | Peppett | Jul 2013 | B1 |
| 20020062566 | Janser | May 2002 | A1 |
| 20080250654 | Chang | Oct 2008 | A1 |
| 20130160303 | Everett | Jun 2013 | A1 |
| 20130312271 | Floyd | Nov 2013 | A1 |
| Number | Date | Country |
|---|---|---|
| 20212218 | Dec 2002 | DE |
| 2277705 | Nov 1994 | GB |
| 2496669 | Oct 2013 | GB |
| Number | Date | Country | |
|---|---|---|---|
| 20160008991 A1 | Jan 2016 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 14275228 | May 2014 | US |
| Child | 14852709 | US |
