Ink Container Rotation Axis via Upward Downward Contact Surfaces

The patent applies dynamics by enabling the ink cartridge to rotate dynamically within the attachment portion while maintaining positional stability through contact surfaces. The rotation is permitted in a controlled manner around a rotation axis, allowing easy operation while preventing unstable movement in other directions through the first and second contact surfaces that define the rotation axis.

The patent applies local quality by providing different types of contact surfaces at specific locations: a first contact surface that faces upward and a second contact surface that faces downward. These localized contact surfaces with specific orientations create the necessary constraints to allow rotation while maintaining stability, rather than using uniform contact throughout the interface.

The patent resolves this contradiction by designing the contact surfaces to be compatible with rotational movement. The first contact surface facing upward and the second contact surface facing downward are positioned to allow the ink cartridge to rotate smoothly around an axis defined by these surfaces, rather than completely restricting movement. This dynamic design enables easy rotation while maintaining positional stability.

The patent applies local quality by strategically positioning contact surfaces with specific orientations (upward and downward facing) at critical locations. This localized arrangement creates a rotation axis through the contact points, allowing rotational movement to be facilitated while maintaining stability in other directions. The specific local geometry of the contact surfaces enables easy operation without compromising position stability.

The patent applies dynamics by defining a specific rotation axis through the first and second contact surfaces that face upward and downward respectively. This axis is determined by the relative positions of the contact surfaces. The ink cartridge is designed to rotate dynamically around this predefined axis, which prevents unwanted rearward movement while maintaining ease of rotation in the intended direction.

The patent applies asymmetry by creating an asymmetric contact configuration where the first contact surface faces upward and the second contact surface faces downward, establishing a specific rotation axis. This asymmetric arrangement of contact surfaces defines the permitted rotation direction and prevents symmetric rotation that could lead to rearward movement, thereby controlling movement while maintaining operational ease.