US2560663A - Ski and its method of manufacture - Google Patents

Ski and its method of manufacture Download PDF

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Publication number
US2560663A
US2560663A US760412A US76041247A US2560663A US 2560663 A US2560663 A US 2560663A US 760412 A US760412 A US 760412A US 76041247 A US76041247 A US 76041247A US 2560663 A US2560663 A US 2560663A
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United States
Prior art keywords
skis
lath
ski
ripped
boards
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US760412A
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English (en)
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Rossignol Abel
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Individual
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Individual
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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

Definitions

  • the desired bend is given to skis during manufacture by softening the wood by means of steam or hot water after which the softened and vbent skis are dried on a heated table or like support. But after some time, the bend disappears unless the skis, when not in use, are held inside suitable pressing devices.
  • said cracks may not be noticed when the wood tain two skis having the same suppleness, i. e.
  • My invention has for its object a ski constituted by two superposed assembled boards one of which appears with its grain lying at and the other with grain upright.
  • My invention has also for its object a method for manufacturing same according to which the two superposed boards are secured together through cold gluing and then bent by an energetic pressing against a suitable bending block during the drying thereof.
  • My invention has also for its object to provide the two skis of a pair with identical sliding surfaces and equal suppleness'and to this end I obtain the lower boards or elements of the skis (Cl. Zim-11.13)
  • Fig. 1 shows the lath having flat or upright grain, as used for making the lower boards of a pair of skis.
  • Fig. 2 is a view of part of each lower board cut out of the lath of Fig. 1.
  • Figs. 3 and 4 show the lath having upright or ilat grain (according as to whether the lath of Fig. 1 has flat or upright grain) used for making the upper boards of the same pair of skis.
  • Fig. 5 shows the two upper boards as obtained after ripping the lath of Figs. 3 and 4.
  • Fig. 6 shows the upper and lower boards of a ski before they are assembled.
  • a lath 2 (Fig. 1) having flat or upright grain is cut to the size required for forming in superposition the two lower boards of a pair of skis.
  • Another lath 3 (Fig. 3) having grain in upright or flat arrangement; according as to -whether the lath 2 has at or upright grain, is cut to the size and shape required for forming in superposition the two upper boards of the pairs of skis and assumes then the appearance shown in Fig. 4.
  • the lath 2 is then ripped as shown by the line 4 (Fig. 1) so as to form two thin boards 5 and 6 (Fig. 2) which constitute the lower boards of the two skis. Care should be taken to use for the lower or sliding surface of the finished skis the surfaces 1 and 8 (Fig. 2) which have been separated by the ripping operation and show consequently perfectly identical friction and sliding coefficients.
  • These boards 5 and 6 which have a maximum suppleness or a maximum rigidity according as to whether they are cut with ilat or upright grain, may be of hard wood such as Y ash, hickory and the like or else compressed or they are cut with upright or flat grain, these two boards will also provide maximum rigidity or maximum suppleness.
  • the lower board 5 (or 6) and the upper board l0 (or Il) are then glued together through their cooperating surfaces I2-I3 or Ill-l5 and held tightly against each other on a suitable bending block in which position they are retained until they are completely dry.
  • the ski is practically deformation-proof. This is due to the fact that the fibrous structures glued together are not identical and consequently the stresses arising in the two assembled boards are not identical and they oppose one another as one board cannot be deformed vwithout being submitted to the counteracting resistance of the other board.
  • skis made in accordance with the above method of manufacture show thus important advantages which no prior method has yet allowed, to wit:
  • the two skis of a pair show the same flexibility, the same resistance to permanent deformation and they have sliding surfaces which have the same sliding factor from one ski to the other.
  • a method for producing a pair of skis consisting in shaping a lath to the outline of a ski, ripping it along a surface parallel to its outer surfaces, ripping a further shaped lath, gluing each ripped element of the first lath to a ripped element of the second lath to form a ski the lower surface of which is constituted by the ripped surface of the rst lath to obtain operative sliding surfaces that are exactly symmetrical for both skis with reference to a longitudinal vertical plane separating them when lying in sideby-side relationship, the transversal cross-section of the contacting surfaces between the superposed ripped elements forming each ski extending rectilinearly across the ski, bending each ski formed by the superposed lath elements into final ski shape and holding them in their bent shape during the drying of the glue between the ripped elements.
  • a pair of skis comprising two skis including each respectively one of the two boards obtained 4 through the ripping of a shaped lath to form the lower members of the skis, each board having its ripped surface directed downwardly, and an upper board having a shape similar to that of the corresponding lower board and contacting with said corresponding lower board along a surface the transverse cross section of which is constituted by a straight line extending throughout the breadth of the skis, the outer lower surface of the lower boards of the two skis assuming thus structures that are exactly symmetrical with reference to a longitudinal vertical plane separating the tWo skis when lying next to each other.
  • a pair of skis comprising two skis including each respectively one of the two boards obtained through the ripping of a shaped lath to form the lower members of the skis, each board having its ripped surface directed downwardly, and one of .the two boards obtained through the ripping of a further shaped lath, last mentioned lath forming an upper board having a shape similar to that of the corresponding lower board and contacting with said corresponding lower board along a surface the transverse cross section of which is constituted by a straight line extending throughout the breadth of the skis, the outer lower surface of the lower boards of the two skis assuming thus structures that are exactly symmetrical with reference to a longitudinal vertical plane separating the two skis when lying next to each other.
  • a pair of skis comprising two skis including each respectively one of the two boards obtained through the ripping of a shaped lath to form the lower members of the skis, each board having its ripped surface directed downwardly, and an upper boardhaving a shape similar to that of the corresponding lower board and contacting with said corresponding lower board along a surface the transverse cross section of which is constituted by a straight line extending throughout the breadth of the skis, the grains of the superposed boards of each ski being orthogonal with reference to one another.
  • a method for producing a pair of skis consisting in shaping a lath to the outlineof a ski, ripping it along a surface parallel to its outer surface, shaping two further strips to form the upper boards of the skis, gluing atiroom temperature each ripped lath to the corresponding upper strip, the transverse cross section of the contact surface between the ripped lath and the cooperating upper strip being constituted by a straight line extending throughout the breadth of the skis, the ripped surfaces of the lath lying on the outside of the compound skis obtained to produce ground-engaging surfaces that are exactly symmetrical for the two skis lying in side by side relationship with reference to a longitudinal vertical plane passing between them, bending each ski formed by the superposed upper strip Yand ripped lath and holding the skis in their bent positions during the drying of the glue between the ripped lath and upper strip forming each of the skis.
  • a method for producing a pair of skis consisting in shaping a lath to the outline of a ski, ripping it along a surface parallel to its outer surfaces, ripping a further shaped lath, gluing each ripped element of the lfirst lath to a ripped lelement of the second lath to form a ski the lower surface of Vwhich is constituted by the ripped surface of the first lath to obtain operative sliding surfaces that are exactly symmetrical for both K 2,560,663 5 6 skis with reference to a longitudinal vertical plane REFERENCES CITED Segaratilg them when lying in Side'by'sd? re'
  • the following references are of record in the latlonship, the grain of the superposed ripped me of this patent:
US760412A 1942-03-18 1947-07-11 Ski and its method of manufacture Expired - Lifetime US2560663A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR888077T 1942-03-18

Publications (1)

Publication Number Publication Date
US2560663A true US2560663A (en) 1951-07-17

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US760412A Expired - Lifetime US2560663A (en) 1942-03-18 1947-07-11 Ski and its method of manufacture

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US (1) US2560663A (fr)
CH (1) CH232638A (fr)
FR (1) FR888077A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040222609A1 (en) * 2003-05-07 2004-11-11 Schmitt Paul G. Waffled wood core skateboard

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH199506A (it) * 1937-12-09 1938-08-31 Arnoldo Fumagalli Ski indeformabile.
CH203711A (de) * 1938-04-08 1939-03-31 Soehne Roth Ski mit drei in gebogener Lage zusammengeleimten Schichten.
US2213903A (en) * 1938-08-04 1940-09-03 Davidson Hamish Mcleod Reinforced laminated ski
US2369004A (en) * 1942-01-08 1945-02-06 Alexis D Andreef Ski

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH199506A (it) * 1937-12-09 1938-08-31 Arnoldo Fumagalli Ski indeformabile.
CH203711A (de) * 1938-04-08 1939-03-31 Soehne Roth Ski mit drei in gebogener Lage zusammengeleimten Schichten.
US2213903A (en) * 1938-08-04 1940-09-03 Davidson Hamish Mcleod Reinforced laminated ski
US2369004A (en) * 1942-01-08 1945-02-06 Alexis D Andreef Ski

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040222609A1 (en) * 2003-05-07 2004-11-11 Schmitt Paul G. Waffled wood core skateboard

Also Published As

Publication number Publication date
CH232638A (fr) 1944-06-15
FR888077A (fr) 1943-12-02

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