A cover for a tablet computer incorporates a built-in stand, allowing viewing angles in portrait and landscape orientations. The cover includes a front cover that is connected to a back cover. In an implementation, the front cover has at least five fold lines formed in the cover. These fold lines me
A cover for a tablet computer incorporates a built-in stand, allowing viewing angles in portrait and landscape orientations. The cover includes a front cover that is connected to a back cover. In an implementation, the front cover has at least five fold lines formed in the cover. These fold lines meet at an intersection point. These fold lines are not parallel to any edges of the front cover. And these fold lines divide the front cover to have least three triangular sections.
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1. A method comprising: providing a first portion of a cover for a tablet computer having first, second, third, and fourth edges, wherein the first and third edges extend in a first direction and are opposite to each other, and the second and fourth edges extend in a second direction and are opposit
1. A method comprising: providing a first portion of a cover for a tablet computer having first, second, third, and fourth edges, wherein the first and third edges extend in a first direction and are opposite to each other, and the second and fourth edges extend in a second direction and are opposite to each other, the second direction is transverse to the first direction, the first edge is longer than the second edge, the first and second edges meet at a first corner, the second and third edges meet at a second corner, the third and fourth edges meet at a third corner, and the fourth and first edges meet at a fourth corner;forming an intersection point of five fold lines in the cover, wherein the intersection point is positioned closer to the first edge than the third edge;forming a first fold line that extends from a first position on the first edge to the intersection point;forming a second fold line that extends from a second position on the first edge to the intersection point;forming a third fold line that extends from a third position on the first edge to the intersection point, wherein the first position is a first distance from the first corner, the second position is a second distance from the first corner, the third position is a third distance from the first corner, and the third distance is longer than the second distance, and the second distance is longer than the first distance;forming a fourth fold line that extends from the second corner to the intersection point, wherein a fourth position is on a line of the third edge, a fourth distance extends from the fourth position to an intersection of the fourth fold line with the line of the third edge;forming a fifth fold line that extends from the third corner to the intersection point;providing a first polygon having sides formed by the third edge, fourth fold line, and fifth fold line, and there are no fold lines in the first polygon;providing a second polygon having sides formed by the first edge, first fold line, and second fold line;providing a third polygon having sides formed by the first edge, second fold line, and third fold line;providing a fourth polygon having sides formed by the second edge, first fold line, and fourth fold line;providing a fifth polygon having sides formed by the fourth edge, third fold line, and fifth fold line;in the fourth polygon, forming a first vertex having a first radius of curvature and a second vertex having a second radius of curvature, wherein the first radius of curvature is greater than the second radius of curvature, the first vertex is closer to the first edge than the third edge, and the second vertex is closer to the third edge than the first edge,as a result of the first radius of curvature being greater than the second radius of curvature, the first distance is greater than the fourth distance,the first corner comprises a first arc having a third radius of curvature that results in the first corner being a rounded corner,the second corner comprises a second arc having a fourth radius of curvature that results in the second corner being a rounded corner, and the second arc has the same radius of curvature as the first arc,the second corner is between the fourth position on the third edge and a fifth position on the second edge, the third edge is joined to the second edge by the second arc, and the third radius of curvature is greater than the first radius of curvature and the second radius of curvature,the fourth corner comprises a third arc having a fifth radius of curvature that results in the fourth corner being a rounded corner, and the third arc has the same radius of curvature as the first arc, andthe third corner comprises a fourth arc having a sixth radius of curvature that results in the third corner being a rounded corner; andproviding a flap portion, coupled to the third edge of the cover, wherein a length of the flap portion extending in the first direction from a first flap portion edge to a second flap portion edge is less than a length of the third edge of the cover, the first flap portion edge does not extend in the first direction toward the second edge beyond the intersection of the fourth fold line with the third edge, the flap portion comprises a closed polygonal shape, and the second vertex is closer to the flap portion than is the first vertex. 2. The method of claim 1 wherein the second position on the first edge is at about a midpoint between the first and fourth corners, the first position on the first edge is between the first corner and the second position, and the third position on the first edge is between the second position and the fourth corner, andthe second distance minus the first distance is a fifth distance, the third distance minus the second distance is a sixth distance, and the sixth distance is equal to the fourth distance. 3. The method of claim 1 wherein the forming the first fold line that extends from the first position on the first edge to the intersection point comprises: providing first and second sections of a rigid layer on opposite sides of the first fold line;providing first and second flexible layers;coupling the first and second flexible layers and the first and second sections of the rigid layer together, wherein the rigid layer is sandwiched between the first and second flexible layers; andat the fourth fold line, coupling the first and second flexible layers together without having the rigid layer sandwiched between the first and second flexible layers, wherein the first fold line extends at a diagonal relative to the second edge. 4. The method of claim 1 comprising: positioning the first, second, third, fourth, and fifth fold lines so that each is not parallel to the first edge of the cover. 5. The method of claim 1 wherein the second position on the first edge is at about a midpoint between the first and fourth corners. 6. The method of claim 1 comprising: providing a second portion, coupled to the first portion via the flap portion, wherein a back of the tablet will be placed against the second portion; andproviding a hinge, coupled between the flap portion and the third edge, wherein the hinge allows rotating of an inside of the first portion to face a front of the tablet. 7. The method of claim 1 comprising: providing a first flexible layer, forming an outer surface of the cover;providing a rigid layer comprising a first section, second section, third section, fourth section, and fifth section;providing a second flexible layer, forming an inner surface of the cover, wherein the rigid layer is coupled between the first and second flexible layers; andforming diagonal fold lines between sections of the rigid layer wherein the first and second flexible layers are coupled together without the rigid layer between them, wherein the diagonal fold lines are diagonal relative to the second edge. 8. The method of claim 7 comprising positioning the first section of the rigid layer between the third edge, fourth fold line, and fifth fold line. 9. The method of claim 7 comprising: positioning the first section of the rigid layer between the third edge, fourth fold line, and fifth fold line; andpositioning the second section of the rigid layer between the first edge, first fold line, and second fold line. 10. The method of claim 7 comprising: positioning the first section of the rigid layer between the third edge, fourth fold line, and fifth fold line;positioning the second section of the rigid layer between the first edge, first fold line, and second fold line; andpositioning the third section of the rigid layer between the first edge, second fold line, and third fold line. 11. The method of claim 10 comprising positioning the fourth section of the rigid layer between the second edge, first fold line, and fourth fold line. 12. The method of claim 10 comprising: positioning the fourth section of the rigid layer between the second edge, first fold line, and fourth fold line; andpositioning the fifth section of the rigid layer between the fourth edge, third fold line, and fifth fold line. 13. The method of claim 7 wherein the first flexible layer comprises leather. 14. The method of claim 7 wherein the first flexible layer comprises polyurethane. 15. The method of claim 7 wherein the first flexible layer comprises polyurethane, and the method comprises: welding the first flexible layer to the second flexible layer along first, second, third, and fourth edges of the cover. 16. The method of claim 7 comprising providing at least one magnet, coupled between the first flexible layer and the second flexible layer. 17. The method of claim 7 wherein at least one of the first flexible layer or second flexible layer comprises a microfiber. 18. The method of claim 3 wherein the first and second flexible layers comprise polyurethane materials and the coupling the first and second flexible layers together without having the rigid layer sandwiched between the first and second flexible layers comprises welding the first and second flexible layers together, whereby the first and second flexible layers will be held together without stitching. 19. The method of claim 1 comprising: providing a hinge, coupled between the flap portion and the third edge, wherein the hinge allows rotating of an inside of the first portion to face a front of the tablet. 20. The method of claim 1 comprising forming a hinge portion, coupled to the flap portion; andproviding a second portion of the cover, coupled to the flap portion, whereinthe hinge allows rotating of the second portion relative to the first portion. 21. The method of claim 1 comprising: forming a second portion of the cover; coupling the second portion to the first portion of the cover; andforming a sixth fold line, coupled to the flap and second portions, wherein the second portion of the cover is rotatable relative to the first portion via the sixth fold line. 22. The method of claim 21 wherein the sixth fold line is between the second portion and the first portion. 23. The method of claim 21 wherein the second portion of the cover comprises a closed polygonal shape. 24. The method of claim 23 wherein the second vertex is closer to the second portion than is the first vertex. 25. The method of claim 23 wherein the second portion of the cover couples to the flap portion. 26. The method of claim 1 wherein the second corner comprising the second arc having the third radius of curvature is closer to the flap portion than the first corner. 27. The method of claim 1 wherein the first polygon is formed by only three sides. 28. The method of claim 1 wherein the first polygon is a triangle with rounded corners. 29. The method of claim 1 wherein the first portion of the cover comprises at most five polygons. 30. The method of claim 1 wherein the first portion of the cover comprises at most five fold lines. 31. The method of claim 1 wherein via the fold lines, the first portion of the cover can be folded to provide a first stand position having a first viewing angle and a second stand position having a second viewing angle for the tablet computer, and the first viewing angle is different from the second viewing angle. 32. A method comprising: providing a first portion of a cover for a tablet computer having first, second, third, and fourth edges, wherein the first and third edges extend in a first direction and are opposite to each other, and the second and fourth edges extend in a second direction and are opposite to each other, the second direction is transverse to the first direction, the first edge is longer than the second edge, the first and second edges meet at a first corner, the second and third edges meet at a second corner, the third and fourth edges meet at a third corner, and the fourth and first edges meet at a fourth corner;forming an intersection point in the cover;providing a first polygon section having a first side formed by the first edge, a second side extending from the first edge to the intersection point, and a third side extending from the first edge to the intersection point, wherein the second and third sides are fold lines of the cover;providing a second polygon section having a first side formed by the first edge, a second side extending from the first edge to the intersection point and common with the second side of the first polygon section, and a third side extending from the first edge to the intersection point, wherein the second and third sides are fold lines of the cover;providing a third polygon section having a first side formed by the third edge, a second side extending from the third edge to the intersection point, and a third side extending from the third edge to the intersection point, wherein the second and third sides are fold lines of the cover and there are no fold lines in the third polygon section,a vertex of the first, second, and third polygon sections meet at the intersection point;providing a fourth polygon section having sides formed by the second edge, third side of the first polygon section, and second side of the third polygon section;providing a fifth polygon section having sides formed by the fourth edge, third side of the second polygon section, and third side of the third polygon section;in the fourth polygon section, forming at least a first vertex having a first radius of curvature and a second vertex having a second radius of curvature, the first radius of curvature is greater than the second radius of curvature, andthe first radius of curvature is closer to the first edge than to the third edge, and the second vertex is closer to the third edge than the first edge;providing a second portion, coupled to the third edge of the cover via a first fold line of the second portion, wherein a length of the first fold line extends in the first direction is less than a length of the third edge of the cover, the second portion comprises a closed polygonal shape, and the second vertex is closer to the second portion than is the first vertex; andproviding a second fold line that is adjacent the first polygon section, wherein the second fold line separates the first polygon section and the fourth polygon section,the second fold line comprises a first width between a first point of the first polygon section and a second point of the fourth polygon section, the first point and second point are on a first line,the second fold line comprises a second width between a third point of the first polygon section and a fourth point of the fourth polygon section, the third point and fourth point are on a second line that is parallel to the first line,the first width is closer to the first edge of the cover than is the second width, and the first width being closer to the first vertex having the first radius of curvature than is the second width, the first width is greater than the second width,the first corner joins the first edge and the second edge and comprises an arc having a third radius of curvature, which results in the first corner being a rounded corner, and the third radius of curvature is greater than the first radius of curvature and the second radius of curvature,the second corner joins the second edge to the third edge and comprises an arc having the third radius of curvature, which results in the second corner being a rounded corner,the third corner joins the first edge to the fourth edge and comprises an arc having the third radius of curvature, which results in the third corner being a rounded corner, andthe fourth corner joins the third edge to the fourth edge and comprises an arc having the third radius of curvature, which results in the fourth corner being a rounded corner. 33. The method of claim 32 comprising positioning the intersection point closer to the first edge than the third edge. 34. The method of claim 32 wherein for the first polygon section, the second side is transverse to the first side. 35. The method of claim 32 wherein for the first polygon section, the first side is longer than the second side. 36. The method of claim 32 wherein a back of the tablet will be placed against the second portion, and the first fold line allows rotating of an inside of the first portion to face a front of the tablet. 37. A method comprising: providing a first portion of a cover for a tablet computer having first, second, third, and fourth edges, wherein the first and third edges extend in a first direction and are opposite to each other, and the second and fourth edges extend in a second direction and are opposite to each other, the second direction is transverse to the first direction, the first edge is longer than the second edge, the first and second edges meet at a first corner, the second and third edges meet at a second corner, the third and fourth edges meet at a third corner, and the fourth and first edges meet at a fourth corner;forming an intersection point of five fold lines in the cover, wherein the intersection point is positioned closer to the first edge than the third edge;forming a first fold line that extends from a first position on the first edge to the intersection point;forming a second fold line that extends from a second position on the first edge to the intersection point;forming a third fold line that extends from a third position on the first edge to the intersection point, wherein the first position is a first distance from the first corner, the second position is a second distance from the first corner, the third position is a third distance from the first corner, and the third distance is longer than the second distance, and the second distance is longer than the first distance;forming a fourth fold line that extends from the second corner to the intersection point, wherein a fourth position is on a line of the third edge, a fourth distance extends from the fourth position to an intersection of the fourth fold line with the line of the third edge;forming a fifth fold line that extends from the third corner to the intersection point;providing a first polygon having sides formed by the third edge, fourth fold line, and fifth fold line, and there are no fold lines in the first polygon;providing a second polygon having sides formed by the first edge, first fold line, and second fold line;providing a third polygon having sides formed by the first edge, second fold line, and third fold line;providing a fourth polygon having sides formed by the second edge, first fold line, and fourth fold line;providing a fifth polygon having sides formed by the fourth edge, third fold line, and fifth fold line;in the fourth polygon, forming a first vertex having a first radius of curvature and a second vertex having a second radius of curvature, wherein the first radius of curvature is greater than the second radius of curvature, the first vertex is closer to the first edge than the third edge, and the second vertex is closer to the third edge than the first edge,as a result of the first radius of curvature being greater than the second radius of curvature, the first distance is greater than the fourth distance,the second corner is between the fourth position on the third edge and a fifth position on the second edge, the third edge is joined to the second edge by an arc having a third radius of curvature, which results in the second corner being a rounded corner, and the third radius of curvature is greater than the first radius of curvature and the second radius of curvature,the first corner is a rounded corner having the third radius of curvature, the third corner is a rounded corner having the third radius of curvature, and the fourth corner is a rounded corner having the third radius of curvature;the second corner comprises the second vertex of the first polygon and a third vertex of the second polygon, the second vertex and third vertex are adjacent, and the third vertex has the second radius of curvature;forming a second portion of the cover, coupled to the third edge of the cover, wherein a length of the second portion extending in the first direction from a first edge of the second portion to a second edge of the second portion is less than a length of the third edge of the cover, the first edge of the second portion does not extend in the first direction toward the second edge of the cover beyond the intersection of the fourth fold line with the third edge, the second portion comprises a closed polygonal shape, and the second vertex is closer to the second portion than is the first vertex; andforming a sixth fold line between the first and second portions of the cover, wherein the sixth fold line couples to the third edge and extends in the first direction from a fifth edge to a sixth edge of the sixth fold line, a length of the sixth fold line in the first direction is less than a length of the third edge of the cover. 38. The method of claim 37 wherein the second portion of the cover comprises at least two rounded corners. 39. The method of claim 37 wherein via the fold lines, the first portion of the case can be folded to provide a first stand position having a first viewing angle and a second stand position having a second viewing angle for the tablet computer, and the first viewing angle is different from the second viewing angle.
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이 특허에 인용된 특허 (4)
Hollingsworth W. Dale (Wilton CT), Folio carrying case for a notebook computer.
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