Multifunctional Rotary Tool for Bookbinding with Replaceable Roughening Inserts

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Solution Overview

Problem

Existing bookbinding tools cause material removal and damage to uncontiguous block portions during notching, offer limited adhesive contact surface increase, and have complex assembly and maintenance processes.

Innovation Solution

A multifunctional rotary tool with hook-shaped roughening inserts that penetrate and cut the block surface perpendicular to the milling blades, allowing for increased adhesive contact without material removal, and simplified maintenance through replaceable inserts.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If prismatic roughening inserts with sharp upper edges are used to cut and roughen the block back, then the contact surface for adhesive application is increased, but material is removed and contiguous block portions are damaged

Engineering Contradiction:

Improvecontact surface for adhesiveVSAvoidmaterial removal and damage

Core Design Contradiction:

Area of stationary objectVSObject-generated harmful factors

Solution Approach 1:

The invention changes the geometric parameters of the roughening elements by using hook-shaped inserts with curved engagement surfaces instead of prismatic inserts with sharp edges. This parameter change allows the hooks to engage and roughen the block back surface without removing material, thus increasing adhesive contact area while preventing damage to contiguous portions.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention converts the potentially harmful cutting action into a beneficial roughening action. Instead of using sharp edges that remove material, the hook-shaped inserts use their curved surfaces to gently engage and roughen the block back, transforming what could be damage into useful surface preparation that increases adhesive bonding without material loss.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Adaptability or versatility

If multiple annular members with milling blades and roughening inserts are assembled together, then multifunctionality is achieved, but assembly and disassembly become complex and labor-intensive

Engineering Contradiction:

ImprovemultifunctionalityVSAvoidassembly complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The invention merges the milling blades and roughening inserts into a single integrated annular member structure. This consolidation reduces the number of separate components that need to be assembled and disassembled, thereby maintaining multifunctionality while significantly simplifying maintenance operations and reducing labor intensity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The annular member is designed to perform multiple functions (milling and roughening) within a single component structure. This universal design allows the tool to achieve multifunctionality without requiring complex assembly of separate specialized components, thereby reducing assembly complexity while maintaining versatility.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If prismatic roughening inserts are positioned radially inwardly offset from milling blades, then both milling and roughening functions are achieved, but the inserts interact with the block in an inclined direction that does not create optimal notching cuts

Engineering Contradiction:

Improvenotching capabilityVSAvoidnotching quality

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The invention changes the engagement parameter of the roughening inserts by using hook-shaped elements that engage the block back surface perpendicularly rather than at an inclination. This parameter change in engagement direction creates optimal notching cuts while maintaining the radial inward offset positioning relative to the milling blades.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10744809B2Multifunctional rotary tool for bookbinding machines and a bookbinding machine

Publication Date: 2020.08.18 K G S S R L UNIPERSONALE

AI summary

A multifunction rotary tool for milling and roughening backs of blocks of pages to be bound by a bookbinding machine comprises a cylindrical base defining a rotation axis, a first annular member adapted to be secured to the cylindrical base and having an outer edge, a crown of milling blades formed in the first annular member proximate to its outer edge and defining a cutting plane perpendicular to the rotation axis, and a plurality of roughening inserts securable to the cylindrical base along a circular area radially offset from the crown of milling blades. Each insert comprises a cylindrical body with a hook-shaped end portion defined by an upper edge with a sharp tip designed to penetrate the block back in a perpendicular cut. The end portion comprises a recessed surface adapted to tear and push downwards the cut material without removing it.