The present invention is a novel method and device for addressing the problem of a flexed or bowed log while building a log cabin. The device is a portable lumber straightening device capable of fitting over an 8 wide log and pushing the log straight so that the bent log lines up with an adjacent straight log. The portable device has a main bridge connecting two pushing walls on opposite sides of a channel. Pneumatic pistons on either side of the walls facilitate these walls in pushing inward to the degree required in respect to the main channel defined by the main bridge.

The present invention is a novel method and device for addressing the problem of a flexed or bowed log while building a log cabin. The device is a portable lumber straightening device capable of fitting over an 8 wide log and pushing the log straight so that the bent log lines up with an adjacent straight log. The portable device has a main bridge connecting two pushing walls on opposite sides of a channel. Pneumatic pistons on either side of the walls facilitate these walls in pushing inward to the degree required in respect to the main channel defined by the main bridge.

Methods of making, and the resultant monolithic drum shell for a musical instrument, that include selecting one or more desired wood fibers, providing a resinous binder solution, and immersing the wood fibers within the resinous binder solution for a duration that saturates and covers the wood fibers with the resinous binder solution to form a drum shell liquid composition. The drum shell liquid composition is deposited into a mold, and then cured to form a monolithic composite drum shell. The monolithic composite drum shell is removed from the mold to provide a ready-to-use drum shell for assembling into a musical instrument.

Disclosed is a bamboo strip shaping method, which includes the following steps: S01: cutting a bamboo tube, and removing inner joints, outer joints and bamboo outer skin; S02: trisecting or quartering the bamboo tube in a longitudinal direction to obtain curved bamboo strips; S03: placing the curved bamboo strips in a bamboo strip shaping device for processing; S04: subjecting the curved bamboo strips to steam treatment and heating softening treatment; S05: pressing and shaping the curved bamboo strips to obtain flattened bamboo strips, and drying for a first time under a maintained pressure; S06: wetting bamboo outer skin surfaces and bamboo inner skin surfaces of the flattened bamboo strips, and drying for a second time; and S07: wetting the bamboo outer skin surfaces and the bamboo inner skin surfaces of the flattened bamboo strips, and drying for a third time.

Methods of making, and the resultant monolithic drum shell for a musical instrument, that include selecting one or more desired wood fibers, providing a resinous binder solution, and immersing the wood fibers within the resinous binder solution for a duration that saturates and covers the wood fibers with the resinous binder solution to form a drum shell liquid composition. The drum shell liquid composition is deposited into a mold, and then cured to form a monolithic composite drum shell. The monolithic composite drum shell is removed from the mold to provide a ready-to-use drum shell for assembling into a musical instrument.

A wooden spring includes a strip of wood of medium thickness a, medium width b, and stretched length l. The coils of strips of wood are made using a method of making wooden springs with a helical shape, the coils having a mean diameter d and an average pitch s. Medium thickness a is 0.2 to 2 millimeters (mm), medium width b is 1 to 10 mm, stretched length l is 10 to 5000 mm, mean diameter d is 6 to 60 mm, and average pitch s is 4 to 40 mm. A wooden fabric interlaced of wooden springs includes helix shaped strips of wood. The wooden springs are interlaced with at least two side by side wooden springs to form a wooden spring fabric.

A wooden spring includes a strip of wood of medium thickness a, medium width b, and stretched length l. The coils of strips of wood are made using a method of making wooden springs with a helical shape, the coils having a mean diameter d and an average pitch s. Medium thickness a is 0.2 to 2 millimeters (mm), medium width b is 1 to 10 mm, stretched length l is 10 to 5000 mm, mean diameter d is 6 to 60 mm, and average pitch s is 4 to 40 mm. A wooden fabric interlaced of wooden springs includes helix shaped strips of wood. The wooden springs are interlaced with at least two side by side wooden springs to form a wooden spring fabric.

The present invention is a novel method and device for addressing the problem of a flexed or bowed log while building a log cabin. The device is a portable lumber straightening device capable of fitting over an 8 wide log and pushing the log straight so that the bent log lines up with an adjacent straight log. The portable device has a main bridge connecting two pushing walls on opposite sides of a channel. Pneumatic pistons on either side of the walls facilitate these walls in pushing inward to the degree required in respect to the main channel defined by the main bridge.

The present invention is a novel method and device for addressing the problem of a flexed or bowed log while building a log cabin. The device is a portable lumber straightening device capable of fitting over an 8 wide log and pushing the log straight so that the bent log lines up with an adjacent straight log. The portable device has a main bridge connecting two pushing walls on opposite sides of a channel. Pneumatic pistons on either side of the walls facilitate these walls in pushing inward to the degree required in respect to the main channel defined by the main bridge.

Described are wooden coil springs, including those made of non-compressed wood, and mattresses with such coil springs. Also described is a method of producing a coil spring made of non-compressed wood, which includes winding a slat on reel, steaming and drying to produce the wooden coil spring. Such a coil spring may have a cylindrical shape, a cone shape or a truncated cone shape, and may have a substantially perpendicular end turn with respect to the longitudinal axis of the coil spring.