US2371305A - Method of making skis - Google Patents

Method of making skis Download PDF

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US2371305A
US2371305A US2371305DA US2371305A US 2371305 A US2371305 A US 2371305A US 2371305D A US2371305D A US 2371305DA US 2371305 A US2371305 A US 2371305A
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ski
blank
layers
blanks
skis
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00—Skis or snowboards
    • A63C5/12—Making thereof; Selection of particular materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
    • B27M3/22—Manufacture or reconditioning of specific semi-finished or finished articles of sport articles, e.g. bowling pins, frames of tennis rackets, skis, paddles
    • 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
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1026—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina with slitting or removal of material at reshaping area prior to reshaping
    • 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
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1043—Subsequent to assembly
    • Y10T156/1044—Subsequent to assembly of parallel stacked sheets only
    • 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
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/108—Flash, trim or excess removal

Definitions

  • This invention relates to improvements in skis and the method of making the same, and Vmore specifically relates to improvements in the manufacture of skis of the laminated type.
  • laminated skis have been made by assembling layers of stock which are glued together, the middle layer or one of the central layers being made shorter than the other layers and tapering in thickness from its ends towards the mid-portion thereof..
  • This central layer provides the increased thickness at the middle of the ski which imparts the additional strength for holding the usual footfattachments.
  • Such prior skis to a considerable extent, require in dividual pressing and finishing operations.
  • Fig. 1 is a planview of a finished ski made in accordance with my invention
  • Fig. 2 is a side elevation of the ski shown in Fig. l;
  • Fig. 3 is a plan view ofl an assembled blank from which the ski is made;
  • Fig. 4 is a vertical longitudinal section taken on theplane indicated 4 4 in Fig. 3;
  • Fig. 5 is a vertical cross-section taken on the plane indicated 5--5 in Fig. 3;
  • Figs. 6, '7 and 8 are sectional views similar to Fig. 5 but illustrating modied constructions
  • Fig. 9 is a plan view of a ski blank showing upper layer thereoi'to facilitate bending
  • Fig. 10 is a vertical longitudinal sectional view taken on the plane indicated llll0 in Fig. 9;
  • Fig. 1l. is a side elevation of a ski blank after the first bending or pressing operation has been performed
  • Y Fig. l2 is a side elevation Aof the ski blank after the cutting or planing operation has been performed, showing the tip ends spread apart and diagrammatically illustrating the placing ofl a sheet of glue between the spread ends;
  • Fig. 13 is a longitudinal section taken through a pile of ski blanks and illustrating the die members for performing the first bending or pressing operation; and i Fig. 14 is a fragmentaryvertical section taken through the tip end of the ski and showing the second pressing operation for bending the tip end.
  • skis of laminated construction It Ahas now become commercial practice to have skis of laminated construction. ⁇ In such prior practice the ski has been made of three layers, the top and bottomlayers extending the full length of the ski and being of uniform thickness throughout the length thereof while the middle layer or one of the middle layers is shorter than thelength of the ski ⁇ and tapers from its ends towards the middle thereof to provide the increased thickness for the central portion of the ski where the shoe is attached. e
  • the ski blank is composed ofthree layers Ill, I2 andY I4, the bottom layer ID and the middle.
  • layer l2 extending the full length of the ski and ⁇ substantially of uniform thickness. throughout thelength of the ski.
  • the rough blank. from which the Ski is madey is disclosed in Figs. 3, 4 and2.
  • the entire bottom surface of the top layer I4 is glued to the top surface of the middle layer I2.
  • I'he layers I0 and I2 are glued together from the heel end of the ski to a point adjacent the end of the top layer I4 leaving the tip end portions I6 and I8 of the layers I and I2 respectively unglued. It will be understood that any one or several of the layers I0, I2 and I4 may be made of builtup construction by laterally gluing together strips which extend longitudinally of the ski.
  • Fig. 6 shows the bottom layer .I0 composed of a plurality of strips 20.' It will be understood that the bottom layer I0, if made up of separate pieces as in Fig. 6, is relatively thin and will not permit planing of the running face of the ski after the ski has become worn.
  • the middle layer I2 may similarly be made up of a plurality of strips glued together in a lateral direction of the ski, such as the strips 22 shown in Fig. 7. This construction may be preferable to that of Fig. 6 since the glued seams between the pieces 22 will be covered by the solid bottom layer I0 and by the solid top layer I4 except at the top surface of the tip end of the ski.
  • the top layer I4 could also be made up of a plurality of pieces 24 as shown in Fig. 8.
  • top layer I4 is relatively thick it may be found desirable to cut slots in the top layer to facilitate bending thereof as illustrated in Figs. f
  • the block or layer I4 will be planed away at its ends to a finished surfacebelow the bottom of the slots.
  • the rough blanks are flat on the top and bottom surfaces thereof they may be placed in a pile as shown in Fig. 13 so that the first bending or pressing operation may be performed upon a number of the blanks at one time.
  • the pile of rough blanks in Fig. 13 may be pressed between the bottom die member 28 and the top die member 30 and the blanks held under presv sure so as to impart the longitudinal curvature to the ski blanks.
  • the free ends I6 and I8 of the layers I0 and I2 are still unglued and are no t," shaped in the press.
  • the ski blank after the ffrst pressing operation has been performed is shown in Fig. 11.
  • Fig. 12 is a side elevation of the ski after the planing operation. It will be noted that the front and rear portions of the top layer I4 have been cut down so that the ends of the blank are relatively thin and taper towards the thick central portion.
  • the tip end ofthe ski may then be glued and shaped.
  • a convenient manner of gluing the ends I6 and I8 of the layers I0 and I2 is ⁇ to spread the ends I6 and I8 and slip in a sheet of glue, such as a sheet of resin or resin-impregnated paper, although liquid glue may be used if desired.
  • the toe portion may be then be shaped by the presser members 34 and 36 as shown in Fig. 14. These presser members may be heated so as to ski blank to shape the blank with the ends melt the glue and cause bonding of the layers of the toe portion at the same time as the shaping. The skis may be nished in any desired manner after the toe has been shaped.
  • the novel method of manufacturing skis disclosed herein will materially reduce the cost of manufacture and will permit the use of automatic machines, thus eliminating hand operations.
  • the making of rough blanks as disclosed enables the pressing of a plurality of ski blanks at one time.
  • the planing of the blanks can more readily be carried out by machine when performed before shaping the toe end-of the ski.
  • the method of making a laminated ski which consists in providing three pieces of stock, each piece being uniform in thickness throughout the length thereof, one of said pieces being shorter and thicker than the other two pieces, gluing said pieces together to ⁇ form a blank with the short piece on top and terminating short of the toe portion of the blank, the'toe portions of the two bottom layers being left unglued, pressing the assembled blank so as to impart a longitudinal curvature thereto, planing the short top layer ofthe blank, then gluing and pressing the toe portions of the two bottom layers.
  • skis which consists in preparing a ski blank having a plurality of laminations, each of said laminationsV being of uniform thickness throughout the length thereof, the laminations being glued together except at the toe portion of the blank, pressing the ski blank to impart a longitudinal curvature thereto, then planing the top lamination of the thicker than an intermediate portion thereof and then gluing and pressing to shape the toe portion of the blank.
  • skis which. consists in assembling three layers of stock, each layer being substantially uniform in thickness throughout the length thereof, said three layers being glued together to form a rough blank having fiat top and bottom surfaces, superimposing a plurality of such blanks in a pile, the individual blanks being unsecured with respect to each other-,

Description

\ March 13, 194.5.. l. MARKS 2,371,305
Y METHOD OF MAKING SKIS Filed sept. 22, 1941 es W,
Patented Mar. 13, 1945 UNITED STATES PATENTv OFFICE l Y 2,371,305 i METHOD MAKING SKIS Isidore Marks, Boston; Mass.
Application September 22, 1941, Serial No. 411,845
4 Claims.
This invention relates to improvements in skis and the method of making the same, and Vmore specifically relates to improvements in the manufacture of skis of the laminated type. Heretofore laminated skis have been made by assembling layers of stock which are glued together, the middle layer or one of the central layers being made shorter than the other layers and tapering in thickness from its ends towards the mid-portion thereof.. This central layer provides the increased thickness at the middle of the ski which imparts the additional strength for holding the usual footfattachments. Such prior skis, to a considerable extent, require in dividual pressing and finishing operations.
It is an object of my invention to provide improvements in the methods of `manufacturing skis which will reduce the cost of manufacture by enabling the pressing of a number of skis at one time to impart the longitudinal curvature to the skis.
More specifically itis an object of my invention to prepare the rough ski blanks by assembling several layers of stock which are of uniform thickness throughout the length of the ski whereby the ski blanks are ilat on the top and bottom surfaces and a numberI of such blanks may be superposed in a pile and pressed simultaneously.
It is further an object of my invention to make a rough ski blank by assembling three layers of slots cut in the stock, the top layer terminating short of the toe portion while the middle and bottom layers extend the full length of the ski, the layers of stock being glued together except at the toe portions Where the middle and bottom layers are left unglued; such rough blanks being superposed in a pile and pressed to impart the longitudinal curv-` so manufactured in which the bottom layers of the ski are substantially uniform in thickness throughout the length of the ski while the top layer of the ski is shaped to taper from its ends towards the middle thereof and preferably terminates short of the toe portion of the ski.
Further objects and advantages of my improvements will be more readilyapparent from thefollowing description of preferred embodiments thereof as illustratedv in the attached drawing in which:
Fig. 1 is a planview of a finished ski made in accordance with my invention;
Fig. 2 is a side elevation of the ski shown in Fig. l;
Fig. 3 is a plan view ofl an assembled blank from which the ski is made;
Fig. 4 is a vertical longitudinal section taken on theplane indicated 4 4 in Fig. 3;
Fig. 5 is a vertical cross-section taken on the plane indicated 5--5 in Fig. 3;
Figs. 6, '7 and 8, are sectional views similar to Fig. 5 but illustrating modied constructions;
Fig. 9 is a plan view of a ski blank showing upper layer thereoi'to facilitate bending; Fig. 10 is a vertical longitudinal sectional view taken on the plane indicated llll0 in Fig. 9;
Fig. 1l. is a side elevation of a ski blank after the first bending or pressing operation has been performed; Y Fig. l2 is a side elevation Aof the ski blank after the cutting or planing operation has been performed, showing the tip ends spread apart and diagrammatically illustrating the placing ofl a sheet of glue between the spread ends;
Fig. 13 is a longitudinal section taken through a pile of ski blanks and illustrating the die members for performing the first bending or pressing operation; and i Fig. 14 is a fragmentaryvertical section taken through the tip end of the ski and showing the second pressing operation for bending the tip end.
It Ahas now become commercial practice to have skis of laminated construction. `In such prior practice the ski has been made of three layers, the top and bottomlayers extending the full length of the ski and being of uniform thickness throughout the length thereof while the middle layer or one of the middle layers is shorter than thelength of the ski` and tapers from its ends towards the middle thereof to provide the increased thickness for the central portion of the ski where the shoe is attached. e
In my novel construction the ski blank is composed ofthree layers Ill, I2 andY I4, the bottom layer ID and the middle. layer l2 extending the full length of the ski and `substantially of uniform thickness. throughout thelength of the ski.
The rough blank. from which the Ski is madey is disclosed in Figs. 3, 4 and2. The entire bottom surface of the top layer I4 is glued to the top surface of the middle layer I2. I'he layers I0 and I2 are glued together from the heel end of the ski to a point adjacent the end of the top layer I4 leaving the tip end portions I6 and I8 of the layers I and I2 respectively unglued. It will be understood that any one or several of the layers I0, I2 and I4 may be made of builtup construction by laterally gluing together strips which extend longitudinally of the ski.
Fig. 6 shows the bottom layer .I0 composed of a plurality of strips 20.' It will be understood that the bottom layer I0, if made up of separate pieces as in Fig. 6, is relatively thin and will not permit planing of the running face of the ski after the ski has become worn. The middle layer I2 may similarly be made up of a plurality of strips glued together in a lateral direction of the ski, such as the strips 22 shown in Fig. 7. This construction may be preferable to that of Fig. 6 since the glued seams between the pieces 22 will be covered by the solid bottom layer I0 and by the solid top layer I4 except at the top surface of the tip end of the ski. The top layer I4 could also be made up of a plurality of pieces 24 as shown in Fig. 8.
If the top layer I4 is relatively thick it may be found desirable to cut slots in the top layer to facilitate bending thereof as illustrated in Figs. f
in subsequent operations the block or layer I4 will be planed away at its ends to a finished surfacebelow the bottom of the slots.
Since the rough blanks are flat on the top and bottom surfaces thereof they may be placed in a pile as shown in Fig. 13 so that the first bending or pressing operation may be performed upon a number of the blanks at one time. 4Thus the pile of rough blanks in Fig. 13 may be pressed between the bottom die member 28 and the top die member 30 and the blanks held under presv sure so as to impart the longitudinal curvature to the ski blanks. It will be understood that during this first pressing operation the free ends I6 and I8 of the layers I0 and I2 are still unglued and are no t," shaped in the press. The ski blank after the ffrst pressing operation has been performed is shown in Fig. 11.
The next step is to perform the planing and trimming operations on the pressed blank. The cutting or planing may be conveniently performed either by machine or by hand since the tip end of the ski has not yet been bent. Fig. 12 is a side elevation of the ski after the planing operation. It will be noted that the front and rear portions of the top layer I4 have been cut down so that the ends of the blank are relatively thin and taper towards the thick central portion.
The tip end ofthe ski may then be glued and shaped. A convenient manner of gluing the ends I6 and I8 of the layers I0 and I2 is `to spread the ends I6 and I8 and slip in a sheet of glue, such as a sheet of resin or resin-impregnated paper, although liquid glue may be used if desired.
The toe portion may be then be shaped by the presser members 34 and 36 as shown in Fig. 14. These presser members may be heated so as to ski blank to shape the blank with the ends melt the glue and cause bonding of the layers of the toe portion at the same time as the shaping. The skis may be nished in any desired manner after the toe has been shaped.
The novel method of manufacturing skis disclosed herein will materially reduce the cost of manufacture and will permit the use of automatic machines, thus eliminating hand operations. The making of rough blanks as disclosed enables the pressing of a plurality of ski blanks at one time. The planing of the blanks can more readily be carried out by machine when performed before shaping the toe end-of the ski. Furthermore, it is relatively less expensive to cut andplane the top layer of theV rough blank as disclosed rather than to fit a specially shaped middle layer between the top and bottom layers of a ski.
I claim:
l. The method of making a laminated ski which consists in providing three pieces of stock, each piece being uniform in thickness throughout the length thereof, one of said pieces being shorter and thicker than the other two pieces, gluing said pieces together to `form a blank with the short piece on top and terminating short of the toe portion of the blank, the'toe portions of the two bottom layers being left unglued, pressing the assembled blank so as to impart a longitudinal curvature thereto, planing the short top layer ofthe blank, then gluing and pressing the toe portions of the two bottom layers.
2. The method of making a laminated ski which consists in gluing together a pair of laminations which extend the full length of the ski but leaving the toe portions of said laminations unglued, then gluing to the top surface thereof a third lamination which extends from the heel end of the ski t0 a point short of the toe portion, then pressing said assembled laminations to impart a longitudinal curvature thereto, then planing the top lamination, then gluing and pressing the toe portions of the first pair of laminations.
3. The method of manufacturing skis which consists in preparing a ski blank having a plurality of laminations, each of said laminationsV being of uniform thickness throughout the length thereof, the laminations being glued together except at the toe portion of the blank, pressing the ski blank to impart a longitudinal curvature thereto, then planing the top lamination of the thicker than an intermediate portion thereof and then gluing and pressing to shape the toe portion of the blank.
4. The method of. manufacturing skis which. consists in assembling three layers of stock, each layer being substantially uniform in thickness throughout the length thereof, said three layers being glued together to form a rough blank having fiat top and bottom surfaces, superimposing a plurality of such blanks in a pile, the individual blanks being unsecured with respect to each other-,
and then pressing the pile of blanks to simultane-. ously impart a longitudinal curvature to all thel .blanks in the pile, then cutting and trimming the top layer of each of the ski blanks whereby said top layer decreases in thickness from its central vportion towards the ends thereof, then sepa-l rately pressing the toe portions of the individual blanks and finishing the skis. Y
ISIDORE MARKS.
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2649124A (en) * 1948-08-30 1953-08-18 Merron Arthur Cyril Manufacture of barrels and the like
US2695178A (en) * 1950-06-15 1954-11-23 Jr George B Rheinfrank Laminated ski and method of making same
US2915425A (en) * 1955-03-04 1959-12-01 Jr William F Biedebach Centrifugal impregnating process of making a pressure tank
US3635484A (en) * 1968-10-16 1972-01-18 Hitachi Chemical Co Ltd Ski made of synthetic resins
US4369970A (en) * 1979-07-10 1983-01-25 Salminen Reijo K Hockey stick and method of manufacturing the same
DE4023644A1 (en) * 1989-09-05 1991-03-07 Salomon Sa Ski with additionally processed ends - combines structural elements in straight carrier with heat meltable material at ends

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2649124A (en) * 1948-08-30 1953-08-18 Merron Arthur Cyril Manufacture of barrels and the like
US2695178A (en) * 1950-06-15 1954-11-23 Jr George B Rheinfrank Laminated ski and method of making same
US2915425A (en) * 1955-03-04 1959-12-01 Jr William F Biedebach Centrifugal impregnating process of making a pressure tank
US3635484A (en) * 1968-10-16 1972-01-18 Hitachi Chemical Co Ltd Ski made of synthetic resins
US4369970A (en) * 1979-07-10 1983-01-25 Salminen Reijo K Hockey stick and method of manufacturing the same
DE4023644A1 (en) * 1989-09-05 1991-03-07 Salomon Sa Ski with additionally processed ends - combines structural elements in straight carrier with heat meltable material at ends
US5336347A (en) * 1989-09-05 1994-08-09 Salomon S.A. Fabrication procedure for and structure of a ski with a curved end
DE4023644C2 (en) * 1989-09-05 1999-04-29 Salomon Sa Process for producing a ski with further processing of the ends and a ski obtained in this way

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