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Publication numberUS3140493 A
Publication typeGrant
Publication dateJul 14, 1964
Filing dateJun 15, 1962
Priority dateJun 15, 1962
Publication numberUS 3140493 A, US 3140493A, US-A-3140493, US3140493 A, US3140493A
InventorsEnnis James W
Original AssigneeCole Mfg Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Machine for installing clips in door james
US 3140493 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

July 14, 1964 J, w; Ems' 3,140,493

MACHINE FOR` INSTALLING CLIPS lIN DooR JAMES Filed June 15,' 1962 63 6" 69 Plas y 2l? 167 179/@ @"'79 m fc@ C ,75 *75 INVENTOR.

JAMES W. ENNIS BY W/M-/ff United States Patenti/(i),

3,140,493 MACHINE FUR INSTALLING CLIPS IN DOGR JAMBS James W. Ennis, Memphis, Tenn., assigner to Cole Manufacturing Company, Memphis, Tenn. Filed June 15, 1962, Ser. No. 202,730 6 Claims. (Cl. 1-210) This invention relates to a machine for installing clips or brackets and the like on doorjambs and the like.

The type of clip that the present invention is particularly adapted to install is that type which is provided with a pair of prongs that are urged into the opposite side edges of a door jamb to attach the clip thereto and which clip is for the ultimate purpose of holding the door jamb in place in the door. Heretofore, in installing clips of the above mentioned type, it was necessary for the person making the installation to hammer the prongs into the door jamb. This is a time consuming operation which adds to the construction costs. Therefore, one of the objects of the present invention is to provide a machine for installing clips or brackets and the like on door jambs and the like that overcomes disadvantages of the previous manual method of installation.

A further object is to provide such a machine that is adapted to install a plurality of the clips at one time.

A further object is to provide such a machine which is easy to operate and with which a high rate of production can be achieved.

A further object is to provide such a machine which is efficient in operation so that the clips are securely installed without any danger of becoming loose later when 1n use.

A further object is to provide such a machine having provisions for holding all of the clips down Vwhile being installed.

A further object is to provide such a machine that is quickly and easily adjustable to accommodate various widths of door jambs.

A further object is to provide such a machine including a pair of eccentrically mounted and substantially cylindrical elongated pressure elements, between which is received a door jamb with the clips placed thereon, and means coupled to said pressure elements for rotating said 'elements eccentrically towards one another to urge the prongs of the clips downwardly and inwardly towards one another into the side edges of the door jamb.

A further object is to provide an alternate form of such a machine which includes a pair of pressure elements having at inner surfaces and means to carry the elements inwardly towards one another to urge the prongs of the clips into engagement with the door jamb.

The means by which the foregoing and other objects of the present invention are accomplished and the manner of their accomplishment will be readily understood from the following specication upon reference to the accompanying drawings, in which:

FIG. l is a top plan viewof the machine of the present invention.

FIG. 2 is a fragmentary end elevational view thereof.

FIG. 3 is an enlarged fragmentary sectional view taken as on the line III--III of FIG. l, and rotated 90 degrees relative thereto, with the workpiece being removed for purposes of clarity.

FIG. 4 is an enlarged fragmentary sectional view taken as on the line IVIV of FIG. l, and rotated 90 degrees relative thereto, with the pressure elements being shown in their initial positions before urging the prongs inwardly.

FIG. 5 is a view similar to FIG. 4 but showing the pressure elements after having urged the prongs into the side edges of the door jamb.

3,140,493 Patented July 14, 1964 FIG. 6 is a somewhat schematic view of an alternate arrangement of the machine of the present invention.

FIG. 7 is an enlarged fragmentary view showing a portion of the device of FIG. 1.

Referring now to the drawings in which the various parts are indicated by numerals, and referring iirst more particularly to the preferred embodiment shown in FIGS. 1-5, the machine 11 of the present invention comprises a framework or base 13 that includes a horizontally disposed open framework top 15 and suitable depending supporting legs 17. Top 15 preferably includes parallel and elongated front member 19 and back member 21 interconnected adjacent the opposite ends thereof by spaced and parallel side members 23, 24. In addition, top 15 includes extension members 25, 26 respectively attached to side members 23, 24 and extending outwardly therefrom. Between side members 23, 24 and spaced along the length of top 15 are a plurality of supporting members 27 fixedly interconnected between front and back members 19, 21.

An elongated plank 29 of wood or the like extends transversely of machine 11 along the middle thereof and substantially from side to side thereof. Plank 29 rests on top 15 and serves as a bed means for the work piece or door jamb I, which rests on top of the plank, as best seen in FIGS. l, 4 and 5. It will be understood that, if desired, plank 29 may be omitted and the top 15 be used as the bed means without departing from the spirit and scope of the present invention.

A pair of elongated pressure elements 33, 35 extend horizontally and transversely of machine 11 with pressure element 35 being spaced rearwardly of pressure element 33 in parallel relationship thereto. In the preferred form, shown in FIGS. 1-5, the pressure elements 33, 35 are each substantially cylindrical in shape and are eccentrically mounted from base 13, in a manner hereinafter described.

Adjacent the opposite ends of pressure element 35 a pair of bearings 37, 39 rotatably and eccentrically support pressure element 35 for rotation about a substantially horizontal axis to carry the pressure element towards and away from pressure element 33, as will be understood better in the description of the operation of the device described later in the specification. A plurality of counter-deflection bearings 41 are respectively provided along the length of pressure element 35 and xedly supported on supporting members 27. Each of bearings 41 preferably comprises a body portion 43 removably xedly attached to its supporting member 27 by fastening bolt 45 extending through a vertical bore in body portion 43 and in supporting member 27 where it is anchored by means of a nut 47, as best seen in FIG. 3. In addition, each bearing 41 includes a forwardly projecting arm 49 having an arcuate bearing surface 51 on the end thereof engaging the reduced diameter cylindrical bearing surface 53 provided in pressure element 35. It will be understood that bearings 41, during the operation of the device, hold the pressure element 35 in a straight disposition and resist any bending or deflection of the pressure element 35 which might otherwise occur during the operation of the device, as will be better understood in the description of the operation of the device to follow later in the specification. It will be understood that the center of cylindrical bearing surface 53 is offset from the center of pressure element 35 and that the portions 54 of pressure element 35 which engage bearings 37, 39 are similarly arranged so that the pressure element is eccentrically mounted.

ressure element 33 is similarly provided with counterdeection bearings 55 which are disposed on the remote side of pressure element 33 from pressure element 35, that is, on the forward side of pressure element 33. Each of bearings 55 includes a body portion 57 that is movably mounted on a supporting member 27 for forward and rearward movement. Thus, a vertically extending fastening bolt 59 having a handle 61 adjacent the upper end thereof extends downwardly through a bore in body portion 57, through a slot 63 in supporting member 27, through a bore in a plate 67, and through a nut 69 fixedly attached to plate 67. A collar 71 is fixedly provided on fastening bolt 59 above body portion 57. It will be understood that by turning handle 61 in one direction, body portion 57 will be clamped between collar 71 and supporting member 27. Slot 63 is elongated in a fore and aft direction so that upon turning of handle 61 in the opposite direction from that above mentioned to loosen body portion 57, the body portion may be moved to the desired location and again clamped in place. In addition, each of bearings 55 includes an arm 73 projecting rearwardly from body portion 57 and provided with an arcuate bearing 75 engaging the reduced diameter cylindrical bearing surface 77 on pressure element 33 to prevent deection of the pressure element in a manner as heretofore described relative to bearings 41 and pressure element 35. It will be understood that the bearings 55 and 41 are directed inwardly towards one another so that they resist outward deflection in the opposite directions. The centers of cylindrical bearing surfaces 77 are eccentric relative to the center of pressure element 33 and the opposite ends of the pressure element are similarly arranged, which is similar to the arrangement heretofore described relative to pressure element 35 and its portions 54, and are rotatably mounted in bearings 79, 81, which are respectively xedly mounted on plates 83, 85 that, in turn, are slidably mounted on top 15. Fastening means having handles S7 and which are preferably similar in construction to the fastening means for bearings 55, are provided for selectively holding plates 83, 85 in a desired location after having been moved by the means hereinafter described.

A shaft 89 is rotatably mounted on top 15 for rotation about a substantially horizontal axis, as by means of a bearing 93 fixedly attached to the top. Shaft 89 is provided with a threaded portion 95 which threadedly extends through a block 97 having a threaded bore so that as a handle 98, which is provided on the opposite end of shaft 89, is turned, the plate 85 will be moved. It will be understood that turn of handle 98 in one direction will cause the plate 85 to slide on top 15 rearwardly, and turn of the handle in the opposite direction will cause the plate to slide forwardly. It will be understood that when the plate 85 is being positioned, the fastening means is loosened by means of handles 87 and then tightened when the plate is in place. Also, it will be understood that the bearings 55 should then be adjusted to the new location of the pressure element 33.

An arrangement similar to the above plate moving means is provided on the opposite end of pressure element 33 and includes a shaft 99, a bearing 101, a threaded portion 103, and a block 105. A sprocket 107 is xedly provided on shaft 99 and coupled to shaft 39 by a continuous chain 169 that extends over sprocket 107 and over a sprocket 111 provided on shaft 89, so that there is simultaneous movement of plates 83 and 85 when handle 93 is turned. Thus, there is an even and a quick adjustment means provided for pressure element 33.

Means is provided for rotating pressure element 33 and is preferably arranged as follows: A circular gear 115 is xedly attached to one end of pressure element 33 and a rack gear 117 engages circular gear 115 so that horizontal movement of rack gear 117 will cause rotation of circular gear 115. A suitable guide 118 is xedly attached to plate S and slidably holds rack gear 117. Rack gear 117 is xedly attached to the outer end of the piston arm 119 of a piston-cylinder assembly 121 of the usual type adapted to be actuated by a suitable fluid, such as hydraulic uid or airpressure, supplied to the piston-cylinder assembly 121 through suitable and well known conduits controlled by a suitable and well known valve 123 having a handle 125 which is mounted on the front of base 13 in position for the operator to manipulate. Piston-cylinder assembly 121 is iixedly supported from plate by suitable means as a support member 126 xedly attached to plate 85.

Similarly, pressure element 35 is provided with means for the rotation thereof and includes a piston-cylinder assembly 127 supported from top 15 by support member 129 and which piston-cylinder assembly is provided with a piston arm 130 with the related parts similar to the related parts of piston-cylinder assembly 121 to rotate pressure element 35. A detailed description of these related parts is not deemed necessary since they are substantially the same as the related parts of piston-cylinder assembly 121. Piston-cylinder assembly 127 is also controlled by valve 123 and handle 125, and is so arranged in a well known manner that upon movement of the handle to a pre-determined position, both of the piston-cylinder assemblies 121 and 127 will be actuated simultaneously to rotate the pressure elements 33, 35 simultaneously. Although the rotation of pressure elements 33, 35 is simultaneous, the pressure elements are rotated in the opposite directions and are each rotated so that the main part as the pressure elements will move downwardly and inwardly towards one another. This can best be seen in FIGS. 4 and 5. In FIG. 4 the pressure elements 33, 35 are in an initial or normally spaced position. With the pressure elements 33, 35 in this position it will be understood that the piston arms 119, 130 are in retracted positions and the handle is in a irst predetermined position. Then, with movement of handle 125 to a second pre-determined position, the pistoncylinder assemblies 121, 127 are actuated in a well known manner to cause piston arms 119, to extend and rotate thepressure elements 33, 35. This rotation, which is preferably substantially a quarter of a turn, will cause the pressure elements to move inwardly and downwardly towards one another into the position shown in FIG. 5. 1t will be understood that in moving from the position shown in FIG. 4 to the position shown in FIG. 5 pressure element 33 will rotate counter clockwise and pressure element 35 will rotate clockwise, as viewed in these figures.

A frame 131 that includes spaced parallel arms 133 fixedly interconnected adjacent the rearward ends thereof by a rod 135, is pivotally mounted from back member 21 at pivot points intermediate the ends of arms 133 by hinge members 137 so that the frame is adapted to pivot about a substantially horizontal axis.

An elongated hold-down bar 139 having upstanding lugs 141 attached thereto is pivotally supported from the forward ends of arms 133 by suitable pivot means as at points 143 which pivotally connect the lugs and arms 133. The weight of hold-down bar 139 is such that the force of gravity keeps the hold-down bar 139 in such a position that the lower surface 145 thereof always remains substantially horizontal. Hold-down bar 139 extends from adjacent end member 23 to a place adjacent end member 25 `and above the space between pressure elements 33, 35. A tension spring 147 is connected to base 13 adjacent one end thereof as at 149 and is connected to frame 131 adjacent the opposite end of the tension spring as at 151 so that the spring urges frame 131 clockwise, as viewed in FIG. 2 and acts as a counter-balance against the weight of hold-down bar 139. A piston-cylinder assembly 153 is pivotally connected as at 155 to base 13 and the piston arm 157 thereof is pivotally connected as at 159 to one of arms 133. Piston-cylinder assembly 153 is also controlled by valve 123 and arranged to vfunction in a manner to be described later.

A tray 161 is supported from topA 15 by means of angular posts 163 xedly attached to top 15 and upstanding therefrom to their point of xed attachment with tray 161 adjacent the upper ends of the posts. Tray 161 is adapted to receive a supply of the clips C, which are to be attached to the door jamb l by means of machine 11 of the present invention, as will be hereinafter described.

A clip C of the type preferably used with machine 11 comprises a strap S having spaced tabs T respectively provided at the opposite ends of strap S, and a pair of prongs P also provided at opposite ends of strap S and extending in a generally opposite direction from tabs T. Initially, clips C are supplied with the prongs P spread apart as best seen in FIG. 4, so that the clips can be placed on the jamb I with the strap S lying on top of the jamb, with the prongs P spaced from the opposite side edges E of the jamb, and with tabs T extending upwardly.

To describe the operation of machine from the beginning of the operation thereof, it will be assumed that handle 125 is in the first pre-determined position heretofore mentioned, that the hold-down bar 139 is in the upward position shown in FIG. 2, that there is no work piece or door jamb I in place, and that pressure elements 33, 35 are in the normally spaced position shown in FIG. 4. The machine 11, if not already set up for the correct width of the door jambs I to be processed, is yfirst adjusted in a manner heretofore described so that pressure elements 33, 35 have the correct spacing therebetween. They should be so spaced that suiiicient room is provided for the clips to be placed therebetween when the pressure elements 33, 35 `are in the initial position shown in FIG. 4, and yet should be close enough so that when the pressure elements are rotated to the position shown in FIG. 5, the prongs P will be fully pressed into the edges E of the door jamb I. After the above mentioned adjustments are made, the operator, who stands in front of machine 11 adjacent handle 125, first places door jamb I on plank 29, Iand then places clips C in spaced relationship along the length of door jamb I, with each of the clips being placed in a manner heretofore described in the preceding paragraph. Next, the operator places handle 125 in the second pre-determined position, heretofore mentioned, which causes hold-down bar 139 to move downwardly on top of clips C and door jamb I to hold the clips and door jamb in place. This positioning of handle 125 also causes piston-cylinder assemblies 121 and 127 to be actuated to rotate pressure elements 33, 35 to the position shown in FIG. 5, in a manner heretofore described. This rotation of the pressure elements 33, 35 will cause the prongs P to be rolled downwardly and inwardly into the side edges E of door jamb I to provide a rolling in action so that the clip is fixedly secured to the door jamb. Finally, handle 125 is moved back to the heretofore mentioned irst pre-determined position which will cause piston-cylinder assembly 153 to be actuated, in a well known manner, and move holddown bar 145 back into the raised position vshown in FIG. 2. This positioning of handle 125 will cause actuation of piston-cylinder assemblies 121, 127 in a well known manner, so that the piston arms 119, 120 will be operated to move the pressure elements 33, 35 back to the position shown in FIG. 4, whereupon the door jamb .l with the clips C lixedly attached thereto are removed from the machine 11 so that the next work piece may be inserted into the machine.

In the foregoing description, a more detailed description of valve 123 and the various conduits to connect the valve to the jacks or piston-cylinder assemblies 121, 127 and 153 is not deemed necessary since these parts are of usual construction and within the knowledge of those skilled in the art.

From the foregoing description it will be understood that a very unique machine is provided which efficiently and quickly installs clips on a production basis so that labor costs are reduced. Also, it will be understood that the unique rolling in action of the pressure elements 33, 35 eiciently urges the prongs into the side edges of the door jambs so that there is no danger of them becoming loose later on when used. In addition, it will be seen that a machine 11 is provided which can be quickly and easily changed from a door jamb having one particular width to a door jamb having another width. In addition, it will be understood that there is substantially no dellection or bending of the pressure elements 33, 35 due to the bearings 41, 51 so that an even pressure is exerted on all of the prongs P of the clips C to give a uniformly efficient action.

Referring now to the alternate embodiment shown in FIG. 6, in this embodiment in place of having cylindrical pressure elements 33, 35 that are eccentrically mounted,

the pressure elements 165, 167 are flat on the respective inner surfaces 169, 171 thereof. Also, instead of having the pressure elements rotated, the pressure elements 165, 167 are arranged to be moved inwardly towards one another to press the prongs of clips C into the side edges E of the door jamb I, by means of a plurality of pistoncylinder assemblies. Thus, the piston arms 173 of a plurality of piston-cylinder assemblies 175 are ixedly attached to pressure element 165, and the piston arms 177 of piston-cylinder assemblies 179 are iixedly attached to pressure element 167 in opposing relationship to piston arms 173. It will be understood that, as in the preferred embodiment, the pressure elements 165, 167 are initially in a spaced apart relationship to receive the door jamb I and clips C, and then the piston-cylinder assemblies 175, 179 are actuated simultaneously to move the pressure elements inwardly towards one another and press the prongs of clips C into the side edges of the door jamb. For purposes of clarity, a hold-down bar and other parts of the machine have not been shown in FIG. 6, but only a somewhat schematic showing of the departure from the preferred embodiment has been provided, since these other parts have been adequately disclosed in the description of the preferred embodiment.

Although the invention has been described in some detail by way of illustration and example for purposes of clarity or understanding, it is to be understood that it is not to be so limited since changes and modifications may be made therein which are within the full intended scope of this invention `as hereinafter claimed.

I claim:

1. A machine for simultaneously installing a plurality of door jamb clips having spaced and inwardly disposed prongs, said machine comprising a horizontally disposed bed means upon which an elongated door jamb is adapted to rest with the plurality of clips thereon along the length thereof in spaced relationship to one another and with the prongs directed inwardly towards the opposite vertical side edges of the door jamb, a pair of pressure elements adjacent said bed means, said pressure elements being in a normally spaced position adapted to receive the door jamb therebetween with the clips thereon, and means movably mounting said elements for movement of said elements inwardly towards one another, said elements being horizontally elongated in a direction perpendicular to the inward direction of movement of said elements and respectively extending along the length of and the opposite side edges of the elongated door jamb whereby said elements are adapted to urge simultaneously all of the prongs of the plurality of clips into the side edges of the door jamb'.

2. A machine for simultaneously installing a plurality of door jamb clips having spaced and inwardly disposed prongs, said machine comprising a horizontally disposed bed means upon which an elongated door jamb is adapted to rest with the plurality of clips thereon along the length thereof in spaced relationship to one another and with the prongs directed inwardly towards the opposite vertical side edges of the door jamb, a pair of pressure elements adjacent said bed means, said pressure elements being in a normally spaced position adapted to receive the door jamb .therebetween with the clips thereon, an elongated holddown bar disposed above the space between said pressure elements and extending substantially parallel therewith, means movably mounting said hold-down bar for movement of said bar downwardly into contact with the door jamb and the plurality of clips thereon, and means movably mounting said elements for movement of said elements inwardly towards one another subsequent to the movement of said bar into contact with the door jamb and the clips thereon, said elements being elongated horizontally in a direction perpendicular to the inward direction of movement of said elements and respectively extending along the length of and the opposite side edges of the elongated. door jamb whereby said elements are adapted to urge simultaneously all of the prongs of the plurality of clips. into the side edges of the door jamb.

3. A machine for simultaneously installing a plurality of door jamb clips having spaced and inwardly disposed prongs, said machine comprising a horizontally disposed bed means upon which an elongated door jamb is adapted to rest with a plurality of clips thereon along the length thereof in spaced relationship to one another and with the prongs directed inwardly towards the opposite vertical side edges of the door jamb, a pair of pressure elements adjacent said bed means, said pressure elements being in a normally spaced at-rest position adapted to receive the door jamb therebetween with the clips thereon, said pressure elements having opposing and substantially flat inner surfaces for engaging said clips, and means movably mounting said elements for movement of said elements; from said at-rest position substantially straight inwardly in a horizontal path towards one another, said elements` being elongated horizontally in a direction perpendicular to the inward direction of movement of said elements and respectively extending along the length of and the opposite side edges of the elongated door jamb whereby said elements are adapted to urge simultaneously all of the' prongs of the plurality of clips into the side edges of the door jamb.

4. A machine for simultaneously installing a plurality of door jamb clips having spaced and inwardly disposed prongs, said machine comprising a horizontally disposed bed means upon which the door jamb is adapted to rest with the plurality of clips thereon and with the prongs directed inwardly towards the opposite vertical side edges of the door jamb, a pair of pressure elements adjacent said bed means, said pressure elements being in a normally spaced at-rest position adapted to receive the door jamb therebetween with the clips thereon, said pressure elements having opposing and substantially flat horizontally extending inner surfaces for engaging said clips, an elongated hold-down bar disposed above the space between said pressure elements, means movably mounting said hold-down bar for movement of said bar downwardly into contact with the door jamb and the clips thereon, and means movably mounting said elements for movement of said elements including a plurality of fluid actuated piston cylinder assemblies from said at-rest position substantially straight inwardly in a horizontal path towards one another thereby being adapted to urge simultaneously the prongs inwardly into the side edges of the door jamb.

5. A machine for installing door jamb clips having inwardly disposed prongs, said machine comprising a base including a horizontally disposed bed means upon which the door jamb is adapted to rest with the clips thereon and with the prongs directed inwardly towards the opposite vertical side edges of the door jamb, a pair of elongated substantially cylindrical pressure elements adjacent said bed means, first means eccentrically rotatably mounting one of said pressure elements from said frame, second means eccentrically rotatably mounting the other of said pressure elements from said frame, said pressure elements being in a normally spaced position adapted to receive the door jamb therebetween with the clips thereon, and means coupled to said pressure elements for simultaneously rotating said elements eccentrically inward towards one another thereby being adapted to urge the prongs inwardly into the side edges of the door jamb.

6. A machine for installing door jamb clips having inwardly disposed prongs, said machine comprising a base including a horizontally disposed bed means upon which the door jamb is adapted to rest with the clips thereon and with the prongs directed inwardly towards the opposite vertical side edges of the door jamb, a pair of elongated substantially cylindrical pressure elements adjacent said bed means, rst means eccentrically rotatably mounting one of said pressure elements from said frame, second means eccentrically rotatably mounting the other of said pressure elements from said frame, said second means including a pair of support members slidably mounted on said frame and a pair of bearing means respectively eccentrically supporting said other of said pressure elements from said support members, means coacting between said frame and said support members for moving said support members to carry said other of said pressure elements towards and away from said one of said pressure elements to adjust the spacing therebetween, a plurality of bearing means mounted on said frame and contacting said pressure elements on the remote sides thereof to prevent deflection of said pressure elements away from one another, said pressure elements being in a normally spaced position adapted to receive the door jamb therebetween with the clips thereon, an elongated holddown bar disposed above the space between said pressure elements, means movably mounting said hold-down bar for movement of said bar downwardly into contact with the door jamb and the clips thereon, and means coupled to each of said pressure elements for simultaneously rotating said elements eccentrically inward towards one another thereby being adapted to urge the prongs inwardly into the side edges of the door jamb.

References Cited in the tile of this patent UNITED STATES PATENTS 1,739,021 Turner Dec. l0, 1929

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1739021 *Nov 30, 1928Dec 10, 1929Mengel CompanyFastener-setting machine
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4288016 *Nov 21, 1979Sep 8, 1981Plastic Components, Inc.Corner bead and installation tool
US5605270 *Nov 28, 1994Feb 25, 1997Bullseye Fastener Development, Inc.Method and apparatus for applying fasteners to picture frames
US5778617 *Oct 27, 1995Jul 14, 1998Free; Gerald R.Press-on corner bead
US5816467 *Dec 16, 1996Oct 6, 1998Bullseye Fastener Development, Inc.Apparatus for applying fasteners to picture frames
Classifications
U.S. Classification227/143, 227/145
International ClassificationB27F7/15, B27F7/00
Cooperative ClassificationB27F7/15
European ClassificationB27F7/15